Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

11 files changed, 1148 insertions, 0 deletions

diff --git a/third_party/libwebrtc/build/apple/OWNERS b/third_party/libwebrtc/build/apple/OWNERS
new file mode 100644
index 0000000000..07d900ebed
--- /dev/null
+++ b/third_party/libwebrtc/build/apple/OWNERS
@@ -0,0 +1,4 @@
+mark@chromium.org
+rohitrao@chromium.org
+rsesek@chromium.org
+sdefresne@chromium.org
diff --git a/third_party/libwebrtc/build/apple/README.md b/third_party/libwebrtc/build/apple/README.md
new file mode 100644
index 0000000000..f60185dc97
--- /dev/null
+++ b/third_party/libwebrtc/build/apple/README.md
@@ -0,0 +1,12 @@
+# About
+
+`//build/apple` contains:
+  * GN templates and configurations shared by Apple platforms
+  * Python build scripts shared by Apple platforms
+
+This directory should only contain templates, configurations and scripts
+that are used exclusively on Apple platforms (currently iOS and macOS).
+They must also be independent of the specific platform.
+
+If a template, configuration or script is limited to only iOS or macOS,
+then they should instead be located in `//build/ios` or `//build/mac`.
diff --git a/third_party/libwebrtc/build/apple/apple_info_plist.gni b/third_party/libwebrtc/build/apple/apple_info_plist.gni
new file mode 100644
index 0000000000..fe51773dd0
--- /dev/null
+++ b/third_party/libwebrtc/build/apple/apple_info_plist.gni
@@ -0,0 +1,60 @@
+# Copyright 2021 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/apple/compile_plist.gni")
+
+# The base template used to generate Info.plist files for iOS and Mac apps and
+# frameworks.
+#
+# Arguments
+#
+#     plist_templates:
+#         string array, paths to plist files which will be used for the bundle.
+#
+#     executable_name:
+#         string, name of the generated target used for the product
+#         and executable name as specified in the output Info.plist.
+#
+#     format:
+#         string, the format to `plutil -convert` the plist to when
+#         generating the output.
+#
+#     extra_substitutions:
+#         (optional) string array, 'key=value' pairs for extra fields which are
+#         specified in a source Info.plist template.
+#
+#     output_name:
+#         (optional) string, name of the generated plist file, default to
+#         "$target_gen_dir/$target_name.plist".
+template("apple_info_plist") {
+  assert(defined(invoker.executable_name),
+         "The executable_name must be specified for $target_name")
+  executable_name = invoker.executable_name
+
+  compile_plist(target_name) {
+    forward_variables_from(invoker,
+                           [
+                             "plist_templates",
+                             "testonly",
+                             "deps",
+                             "visibility",
+                             "format",
+                           ])
+
+    if (defined(invoker.output_name)) {
+      output_name = invoker.output_name
+    } else {
+      output_name = "$target_gen_dir/$target_name.plist"
+    }
+
+    substitutions = [
+      "EXECUTABLE_NAME=$executable_name",
+      "GCC_VERSION=com.apple.compilers.llvm.clang.1_0",
+      "PRODUCT_NAME=$executable_name",
+    ]
+    if (defined(invoker.extra_substitutions)) {
+      substitutions += invoker.extra_substitutions
+    }
+  }
+}
diff --git a/third_party/libwebrtc/build/apple/compile_entitlements.gni b/third_party/libwebrtc/build/apple/compile_entitlements.gni
new file mode 100644
index 0000000000..006d5ac2d5
--- /dev/null
+++ b/third_party/libwebrtc/build/apple/compile_entitlements.gni
@@ -0,0 +1,51 @@
+# Copyright 2021 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/apple/compile_plist.gni")
+
+# Template to merge multiple .entitlements files performing variable
+# substitutions.
+#
+# Arguments
+#
+#     entitlements_templates:
+#         string array, paths to entitlements files which will be used for the
+#         bundle.
+#
+#     substitutions:
+#         string array, 'key=value' pairs used to replace ${key} by value
+#         when generating the output plist file.
+#
+#     output_name:
+#         string, name of the generated entitlements file.
+template("compile_entitlements") {
+  assert(defined(invoker.entitlements_templates),
+         "A list of template plist files must be specified for $target_name")
+
+  compile_plist(target_name) {
+    forward_variables_from(invoker,
+                           "*",
+                           [
+                             "entitlements_templates",
+                             "format",
+                             "plist_templates",
+                           ])
+
+    plist_templates = invoker.entitlements_templates
+
+    # Entitlements files are always encoded in xml1.
+    format = "xml1"
+
+    # Entitlements files use unsubstitued variables, so define substitutions
+    # to leave those variables untouched.
+    if (!defined(substitutions)) {
+      substitutions = []
+    }
+
+    substitutions += [
+      "AppIdentifierPrefix=\$(AppIdentifierPrefix)",
+      "CFBundleIdentifier=\$(CFBundleIdentifier)",
+    ]
+  }
+}
diff --git a/third_party/libwebrtc/build/apple/compile_plist.gni b/third_party/libwebrtc/build/apple/compile_plist.gni
new file mode 100644
index 0000000000..90485b6a2a
--- /dev/null
+++ b/third_party/libwebrtc/build/apple/compile_plist.gni
@@ -0,0 +1,76 @@
+# Copyright 2021 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Template to merge multiple plist files and perform variable substitutions.
+#
+# Arguments
+#
+#     plist_templates:
+#         string array, paths to plist files which will be used for the bundle.
+#
+#     format:
+#         string, the format to `plutil -convert` the plist to when
+#         generating the output.
+#
+#     substitutions:
+#         string array, 'key=value' pairs used to replace ${key} by value
+#         when generating the output plist file.
+#
+#     output_name:
+#         string, name of the generated plist file.
+template("compile_plist") {
+  assert(defined(invoker.plist_templates),
+         "A list of template plist files must be specified for $target_name")
+  assert(defined(invoker.format),
+         "The plist format must be specified for $target_name")
+  assert(defined(invoker.substitutions),
+         "A list of key=value pairs must be specified for $target_name")
+  assert(defined(invoker.output_name),
+         "The name of the output file must be specified for $target_name")
+
+  _output_name = invoker.output_name
+  _merged_name = get_path_info(_output_name, "dir") + "/" +
+                 get_path_info(_output_name, "name") + "_merged." +
+                 get_path_info(_output_name, "extension")
+
+  _merge_target = target_name + "_merge"
+
+  action(_merge_target) {
+    forward_variables_from(invoker,
+                           [
+                             "deps",
+                             "testonly",
+                           ])
+
+    script = "//build/apple/plist_util.py"
+    sources = invoker.plist_templates
+    outputs = [ _merged_name ]
+    args = [
+             "merge",
+             "-f=" + invoker.format,
+             "-o=" + rebase_path(_merged_name, root_build_dir),
+           ] + rebase_path(invoker.plist_templates, root_build_dir)
+  }
+
+  action(target_name) {
+    forward_variables_from(invoker,
+                           [
+                             "testonly",
+                             "visibility",
+                           ])
+    script = "//build/apple/plist_util.py"
+    sources = [ _merged_name ]
+    outputs = [ _output_name ]
+    args = [
+      "substitute",
+      "-f=" + invoker.format,
+      "-o=" + rebase_path(_output_name, root_build_dir),
+      "-t=" + rebase_path(_merged_name, root_build_dir),
+    ]
+    foreach(_substitution, invoker.substitutions) {
+      args += [ "-s=$_substitution" ]
+    }
+    deps = [ ":$_merge_target" ]
+  }
+}
diff --git a/third_party/libwebrtc/build/apple/convert_plist.gni b/third_party/libwebrtc/build/apple/convert_plist.gni
new file mode 100644
index 0000000000..a1134d9b31
--- /dev/null
+++ b/third_party/libwebrtc/build/apple/convert_plist.gni
@@ -0,0 +1,41 @@
+# Copyright 2021 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Convert plist file to given format.
+#
+# Arguments
+#
+#   source:
+#     string, path to the plist file to convert
+#
+#   output:
+#     string, path to the converted plist, must be under $root_build_dir
+#
+#   format:
+#     string, the format to convert the plist to. Either "binary1" or "xml1".
+template("convert_plist") {
+  assert(defined(invoker.source), "source must be defined for $target_name")
+  assert(defined(invoker.output), "output must be defined for $target_name")
+  assert(defined(invoker.format), "format must be defined for $target_name")
+
+  action(target_name) {
+    forward_variables_from(invoker,
+                           [
+                             "visibility",
+                             "testonly",
+                             "deps",
+                           ])
+
+    script = "//build/apple/plist_util.py"
+    sources = [ invoker.source ]
+    outputs = [ invoker.output ]
+    args = [
+      "merge",
+      "--format=${invoker.format}",
+      "-o",
+      rebase_path(invoker.output, root_build_dir),
+      rebase_path(invoker.source, root_build_dir),
+    ]
+  }
+}
diff --git a/third_party/libwebrtc/build/apple/plist_util.py b/third_party/libwebrtc/build/apple/plist_util.py
new file mode 100644
index 0000000000..54cf46176b
--- /dev/null
+++ b/third_party/libwebrtc/build/apple/plist_util.py
@@ -0,0 +1,265 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import argparse
+import codecs
+import plistlib
+import os
+import re
+import subprocess
+import sys
+import tempfile
+import shlex
+
+if sys.version_info.major < 3:
+  basestring_compat = basestring
+else:
+  basestring_compat = str
+
+# Xcode substitutes variables like ${PRODUCT_NAME} or $(PRODUCT_NAME) when
+# compiling Info.plist. It also supports supports modifiers like :identifier
+# or :rfc1034identifier. SUBSTITUTION_REGEXP_LIST is a list of regular
+# expressions matching a variable substitution pattern with an optional
+# modifier, while INVALID_CHARACTER_REGEXP matches all characters that are
+# not valid in an "identifier" value (used when applying the modifier).
+INVALID_CHARACTER_REGEXP = re.compile(r'[_/\s]')
+SUBSTITUTION_REGEXP_LIST = (
+    re.compile(r'\$\{(?P<id>[^}]*?)(?P<modifier>:[^}]*)?\}'),
+    re.compile(r'\$\((?P<id>[^}]*?)(?P<modifier>:[^}]*)?\)'),
+)
+
+
+class SubstitutionError(Exception):
+  def __init__(self, key):
+    super(SubstitutionError, self).__init__()
+    self.key = key
+
+  def __str__(self):
+    return "SubstitutionError: {}".format(self.key)
+
+
+def InterpolateString(value, substitutions):
+  """Interpolates variable references into |value| using |substitutions|.
+
+  Inputs:
+    value: a string
+    substitutions: a mapping of variable names to values
+
+  Returns:
+    A new string with all variables references ${VARIABLES} replaced by their
+    value in |substitutions|. Raises SubstitutionError if a variable has no
+    substitution.
+  """
+
+  def repl(match):
+    variable = match.group('id')
+    if variable not in substitutions:
+      raise SubstitutionError(variable)
+    # Some values need to be identifier and thus the variables references may
+    # contains :modifier attributes to indicate how they should be converted
+    # to identifiers ("identifier" replaces all invalid characters by '_' and
+    # "rfc1034identifier" replaces them by "-" to make valid URI too).
+    modifier = match.group('modifier')
+    if modifier == ':identifier':
+      return INVALID_CHARACTER_REGEXP.sub('_', substitutions[variable])
+    elif modifier == ':rfc1034identifier':
+      return INVALID_CHARACTER_REGEXP.sub('-', substitutions[variable])
+    else:
+      return substitutions[variable]
+
+  for substitution_regexp in SUBSTITUTION_REGEXP_LIST:
+    value = substitution_regexp.sub(repl, value)
+  return value
+
+
+def Interpolate(value, substitutions):
+  """Interpolates variable references into |value| using |substitutions|.
+
+  Inputs:
+    value: a value, can be a dictionary, list, string or other
+    substitutions: a mapping of variable names to values
+
+  Returns:
+    A new value with all variables references ${VARIABLES} replaced by their
+    value in |substitutions|. Raises SubstitutionError if a variable has no
+    substitution.
+  """
+  if isinstance(value, dict):
+    return {k: Interpolate(v, substitutions) for k, v in value.items()}
+  if isinstance(value, list):
+    return [Interpolate(v, substitutions) for v in value]
+  if isinstance(value, basestring_compat):
+    return InterpolateString(value, substitutions)
+  return value
+
+
+def LoadPList(path):
+  """Loads Plist at |path| and returns it as a dictionary."""
+  if sys.version_info.major == 2:
+    fd, name = tempfile.mkstemp()
+    try:
+      subprocess.check_call(['plutil', '-convert', 'xml1', '-o', name, path])
+      with os.fdopen(fd, 'rb') as f:
+        return plistlib.readPlist(f)
+    finally:
+      os.unlink(name)
+  else:
+    with open(path, 'rb') as f:
+      return plistlib.load(f)
+
+
+def SavePList(path, format, data):
+  """Saves |data| as a Plist to |path| in the specified |format|."""
+  # The below does not replace the destination file but update it in place,
+  # so if more than one hardlink points to destination all of them will be
+  # modified. This is not what is expected, so delete destination file if
+  # it does exist.
+  if os.path.exists(path):
+    os.unlink(path)
+  if sys.version_info.major == 2:
+    fd, name = tempfile.mkstemp()
+    try:
+      with os.fdopen(fd, 'wb') as f:
+        plistlib.writePlist(data, f)
+      subprocess.check_call(['plutil', '-convert', format, '-o', path, name])
+    finally:
+      os.unlink(name)
+  else:
+    with open(path, 'wb') as f:
+      plist_format = {'binary1': plistlib.FMT_BINARY, 'xml1': plistlib.FMT_XML}
+      plistlib.dump(data, f, fmt=plist_format[format])
+
+
+def MergePList(plist1, plist2):
+  """Merges |plist1| with |plist2| recursively.
+
+  Creates a new dictionary representing a Property List (.plist) files by
+  merging the two dictionary |plist1| and |plist2| recursively (only for
+  dictionary values). List value will be concatenated.
+
+  Args:
+    plist1: a dictionary representing a Property List (.plist) file
+    plist2: a dictionary representing a Property List (.plist) file
+
+  Returns:
+    A new dictionary representing a Property List (.plist) file by merging
+    |plist1| with |plist2|. If any value is a dictionary, they are merged
+    recursively, otherwise |plist2| value is used. If values are list, they
+    are concatenated.
+  """
+  result = plist1.copy()
+  for key, value in plist2.items():
+    if isinstance(value, dict):
+      old_value = result.get(key)
+      if isinstance(old_value, dict):
+        value = MergePList(old_value, value)
+    if isinstance(value, list):
+      value = plist1.get(key, []) + plist2.get(key, [])
+    result[key] = value
+  return result
+
+
+class Action(object):
+  """Class implementing one action supported by the script."""
+
+  @classmethod
+  def Register(cls, subparsers):
+    parser = subparsers.add_parser(cls.name, help=cls.help)
+    parser.set_defaults(func=cls._Execute)
+    cls._Register(parser)
+
+
+class MergeAction(Action):
+  """Class to merge multiple plist files."""
+
+  name = 'merge'
+  help = 'merge multiple plist files'
+
+  @staticmethod
+  def _Register(parser):
+    parser.add_argument('-o',
+                        '--output',
+                        required=True,
+                        help='path to the output plist file')
+    parser.add_argument('-f',
+                        '--format',
+                        required=True,
+                        choices=('xml1', 'binary1'),
+                        help='format of the plist file to generate')
+    parser.add_argument(
+        '-x',
+        '--xcode-version',
+        help='version of Xcode, ignored (can be used to force rebuild)')
+    parser.add_argument('path', nargs="+", help='path to plist files to merge')
+
+  @staticmethod
+  def _Execute(args):
+    data = {}
+    for filename in args.path:
+      data = MergePList(data, LoadPList(filename))
+    SavePList(args.output, args.format, data)
+
+
+class SubstituteAction(Action):
+  """Class implementing the variable substitution in a plist file."""
+
+  name = 'substitute'
+  help = 'perform pattern substitution in a plist file'
+
+  @staticmethod
+  def _Register(parser):
+    parser.add_argument('-o',
+                        '--output',
+                        required=True,
+                        help='path to the output plist file')
+    parser.add_argument('-t',
+                        '--template',
+                        required=True,
+                        help='path to the template file')
+    parser.add_argument('-s',
+                        '--substitution',
+                        action='append',
+                        default=[],
+                        help='substitution rule in the format key=value')
+    parser.add_argument('-f',
+                        '--format',
+                        required=True,
+                        choices=('xml1', 'binary1'),
+                        help='format of the plist file to generate')
+    parser.add_argument(
+        '-x',
+        '--xcode-version',
+        help='version of Xcode, ignored (can be used to force rebuild)')
+
+  @staticmethod
+  def _Execute(args):
+    substitutions = {}
+    for substitution in args.substitution:
+      key, value = substitution.split('=', 1)
+      substitutions[key] = value
+    data = Interpolate(LoadPList(args.template), substitutions)
+    SavePList(args.output, args.format, data)
+
+
+def Main():
+  # Cache this codec so that plistlib can find it. See
+  # https://crbug.com/1005190#c2 for more details.
+  codecs.lookup('utf-8')
+
+  parser = argparse.ArgumentParser(description='manipulate plist files')
+  subparsers = parser.add_subparsers()
+
+  for action in [MergeAction, SubstituteAction]:
+    action.Register(subparsers)
+
+  args = parser.parse_args()
+  args.func(args)
+
+
+if __name__ == '__main__':
+  # TODO(https://crbug.com/941669): Temporary workaround until all scripts use
+  # python3 by default.
+  if sys.version_info[0] < 3:
+    os.execvp('python3', ['python3'] + sys.argv)
+  sys.exit(Main())
diff --git a/third_party/libwebrtc/build/apple/tweak_info_plist.gni b/third_party/libwebrtc/build/apple/tweak_info_plist.gni
new file mode 100644
index 0000000000..33f22ca2d0
--- /dev/null
+++ b/third_party/libwebrtc/build/apple/tweak_info_plist.gni
@@ -0,0 +1,86 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/util/lastchange.gni")
+
+# Template to run the tweak_info_plist.py script on a plist.
+#
+# Arguments:
+#
+#     info_plist:
+#         (optional), string, the plist to tweak.
+#
+#     info_plists:
+#         (optional), list of string, the plist files to merge and tweak.
+#
+#     args:
+#         (optional), list of string, the arguments to pass to the
+#         tweak_info_plist.py script.
+#
+# Callers should use get_target_outputs() to get the output name. One of
+# info_plist or info_plists must be specified.
+template("tweak_info_plist") {
+  _output_name = "$target_gen_dir/${target_name}_tweaked.plist"
+
+  if (defined(invoker.info_plists)) {
+    assert(!defined(invoker.info_plist),
+           "Cannot have both info_plist and info_plists for $target_name")
+
+    _source_name = "$target_gen_dir/${target_name}_merged.plist"
+    _deps = [ ":" + target_name + "_merge_plist" ]
+
+    action(target_name + "_merge_plist") {
+      forward_variables_from(invoker,
+                             [
+                               "testonly",
+                               "deps",
+                             ])
+      script = "//build/apple/plist_util.py"
+      sources = invoker.info_plists
+      outputs = [ _source_name ]
+      args = [
+               "merge",
+               "-f=xml1",
+               "-o=" + rebase_path(_source_name, root_build_dir),
+             ] + rebase_path(invoker.info_plists, root_build_dir)
+    }
+  } else {
+    assert(defined(invoker.info_plist),
+           "The info_plist must be specified in $target_name")
+
+    _source_name = invoker.info_plist
+    _deps = []
+    if (defined(invoker.deps)) {
+      _deps += invoker.deps
+    }
+  }
+
+  action(target_name) {
+    forward_variables_from(invoker,
+                           [
+                             "args",
+                             "testonly",
+                           ])
+    script = "//build/apple/tweak_info_plist.py"
+    inputs = [
+      script,
+      "//build/util/version.py",
+      lastchange_file,
+      "//chrome/VERSION",
+    ]
+    sources = [ _source_name ]
+    outputs = [ _output_name ]
+    if (!defined(args)) {
+      args = []
+    }
+    args += [
+      "--plist",
+      rebase_path(_source_name, root_build_dir),
+      "--output",
+      rebase_path(_output_name, root_build_dir),
+      "--platform=$current_os",
+    ]
+    deps = _deps
+  }
+}
diff --git a/third_party/libwebrtc/build/apple/tweak_info_plist.py b/third_party/libwebrtc/build/apple/tweak_info_plist.py
new file mode 100755
index 0000000000..76f64dc37c
--- /dev/null
+++ b/third_party/libwebrtc/build/apple/tweak_info_plist.py
@@ -0,0 +1,447 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+#
+# Xcode supports build variable substitutions and CPP; sadly, that doesn't work
+# because:
+#
+# 1. Xcode wants to do the Info.plist work before it runs any build phases,
+#    this means if we were to generate a .h file for INFOPLIST_PREFIX_HEADER
+#    we'd have to put it in another target so it runs in time.
+# 2. Xcode also doesn't check to see if the header being used as a prefix for
+#    the Info.plist has changed.  So even if we updated it, it's only looking
+#    at the modtime of the info.plist to see if that's changed.
+#
+# So, we work around all of this by making a script build phase that will run
+# during the app build, and simply update the info.plist in place.  This way
+# by the time the app target is done, the info.plist is correct.
+#
+
+from __future__ import print_function
+
+import optparse
+import os
+import plistlib
+import re
+import subprocess
+import sys
+import tempfile
+
+TOP = os.path.dirname(os.path.dirname(os.path.dirname(__file__)))
+
+
+def _ConvertPlist(source_plist, output_plist, fmt):
+  """Convert |source_plist| to |fmt| and save as |output_plist|."""
+  assert sys.version_info.major == 2, "Use plistlib directly in Python 3"
+  return subprocess.call(
+      ['plutil', '-convert', fmt, '-o', output_plist, source_plist])
+
+
+def _GetOutput(args):
+  """Runs a subprocess and waits for termination. Returns (stdout, returncode)
+  of the process. stderr is attached to the parent."""
+  proc = subprocess.Popen(args, stdout=subprocess.PIPE)
+  stdout, _ = proc.communicate()
+  return stdout.decode('UTF-8'), proc.returncode
+
+
+def _RemoveKeys(plist, *keys):
+  """Removes a varargs of keys from the plist."""
+  for key in keys:
+    try:
+      del plist[key]
+    except KeyError:
+      pass
+
+
+def _ApplyVersionOverrides(version, keys, overrides, separator='.'):
+  """Applies version overrides.
+
+  Given a |version| string as "a.b.c.d" (assuming a default separator) with
+  version components named by |keys| then overrides any value that is present
+  in |overrides|.
+
+  >>> _ApplyVersionOverrides('a.b', ['major', 'minor'], {'minor': 'd'})
+  'a.d'
+  """
+  if not overrides:
+    return version
+  version_values = version.split(separator)
+  for i, (key, value) in enumerate(zip(keys, version_values)):
+    if key in overrides:
+      version_values[i] = overrides[key]
+  return separator.join(version_values)
+
+
+def _GetVersion(version_format, values, overrides=None):
+  """Generates a version number according to |version_format| using the values
+  from |values| or |overrides| if given."""
+  result = version_format
+  for key in values:
+    if overrides and key in overrides:
+      value = overrides[key]
+    else:
+      value = values[key]
+    result = result.replace('@%s@' % key, value)
+  return result
+
+
+def _AddVersionKeys(plist, version_format_for_key, version=None,
+                    overrides=None):
+  """Adds the product version number into the plist. Returns True on success and
+  False on error. The error will be printed to stderr."""
+  if not version:
+    # Pull in the Chrome version number.
+    VERSION_TOOL = os.path.join(TOP, 'build/util/version.py')
+    VERSION_FILE = os.path.join(TOP, 'chrome/VERSION')
+    (stdout, retval) = _GetOutput([
+        VERSION_TOOL, '-f', VERSION_FILE, '-t',
+        '@MAJOR@.@MINOR@.@BUILD@.@PATCH@'
+    ])
+
+    # If the command finished with a non-zero return code, then report the
+    # error up.
+    if retval != 0:
+      return False
+
+    version = stdout.strip()
+
+  # Parse the given version number, that should be in MAJOR.MINOR.BUILD.PATCH
+  # format (where each value is a number). Note that str.isdigit() returns
+  # True if the string is composed only of digits (and thus match \d+ regexp).
+  groups = version.split('.')
+  if len(groups) != 4 or not all(element.isdigit() for element in groups):
+    print('Invalid version string specified: "%s"' % version, file=sys.stderr)
+    return False
+  values = dict(zip(('MAJOR', 'MINOR', 'BUILD', 'PATCH'), groups))
+
+  for key in version_format_for_key:
+    plist[key] = _GetVersion(version_format_for_key[key], values, overrides)
+
+  # Return with no error.
+  return True
+
+
+def _DoSCMKeys(plist, add_keys):
+  """Adds the SCM information, visible in about:version, to property list. If
+  |add_keys| is True, it will insert the keys, otherwise it will remove them."""
+  scm_revision = None
+  if add_keys:
+    # Pull in the Chrome revision number.
+    VERSION_TOOL = os.path.join(TOP, 'build/util/version.py')
+    LASTCHANGE_FILE = os.path.join(TOP, 'build/util/LASTCHANGE')
+    (stdout, retval) = _GetOutput(
+        [VERSION_TOOL, '-f', LASTCHANGE_FILE, '-t', '@LASTCHANGE@'])
+    if retval:
+      return False
+    scm_revision = stdout.rstrip()
+
+  # See if the operation failed.
+  _RemoveKeys(plist, 'SCMRevision')
+  if scm_revision != None:
+    plist['SCMRevision'] = scm_revision
+  elif add_keys:
+    print('Could not determine SCM revision.  This may be OK.', file=sys.stderr)
+
+  return True
+
+
+def _AddBreakpadKeys(plist, branding, platform, staging):
+  """Adds the Breakpad keys. This must be called AFTER _AddVersionKeys() and
+  also requires the |branding| argument."""
+  plist['BreakpadReportInterval'] = '3600'  # Deliberately a string.
+  plist['BreakpadProduct'] = '%s_%s' % (branding, platform)
+  plist['BreakpadProductDisplay'] = branding
+  if staging:
+    plist['BreakpadURL'] = 'https://clients2.google.com/cr/staging_report'
+  else:
+    plist['BreakpadURL'] = 'https://clients2.google.com/cr/report'
+
+  # These are both deliberately strings and not boolean.
+  plist['BreakpadSendAndExit'] = 'YES'
+  plist['BreakpadSkipConfirm'] = 'YES'
+
+
+def _RemoveBreakpadKeys(plist):
+  """Removes any set Breakpad keys."""
+  _RemoveKeys(plist, 'BreakpadURL', 'BreakpadReportInterval', 'BreakpadProduct',
+              'BreakpadProductDisplay', 'BreakpadVersion',
+              'BreakpadSendAndExit', 'BreakpadSkipConfirm')
+
+
+def _TagSuffixes():
+  # Keep this list sorted in the order that tag suffix components are to
+  # appear in a tag value. That is to say, it should be sorted per ASCII.
+  components = ('full', )
+  assert tuple(sorted(components)) == components
+
+  components_len = len(components)
+  combinations = 1 << components_len
+  tag_suffixes = []
+  for combination in range(0, combinations):
+    tag_suffix = ''
+    for component_index in range(0, components_len):
+      if combination & (1 << component_index):
+        tag_suffix += '-' + components[component_index]
+    tag_suffixes.append(tag_suffix)
+  return tag_suffixes
+
+
+def _AddKeystoneKeys(plist, bundle_identifier, base_tag):
+  """Adds the Keystone keys. This must be called AFTER _AddVersionKeys() and
+  also requires the |bundle_identifier| argument (com.example.product)."""
+  plist['KSVersion'] = plist['CFBundleShortVersionString']
+  plist['KSProductID'] = bundle_identifier
+  plist['KSUpdateURL'] = 'https://tools.google.com/service/update2'
+
+  _RemoveKeys(plist, 'KSChannelID')
+  if base_tag != '':
+    plist['KSChannelID'] = base_tag
+  for tag_suffix in _TagSuffixes():
+    if tag_suffix:
+      plist['KSChannelID' + tag_suffix] = base_tag + tag_suffix
+
+
+def _RemoveKeystoneKeys(plist):
+  """Removes any set Keystone keys."""
+  _RemoveKeys(plist, 'KSVersion', 'KSProductID', 'KSUpdateURL')
+
+  tag_keys = ['KSChannelID']
+  for tag_suffix in _TagSuffixes():
+    tag_keys.append('KSChannelID' + tag_suffix)
+  _RemoveKeys(plist, *tag_keys)
+
+
+def _AddGTMKeys(plist, platform):
+  """Adds the GTM metadata keys. This must be called AFTER _AddVersionKeys()."""
+  plist['GTMUserAgentID'] = plist['CFBundleName']
+  if platform == 'ios':
+    plist['GTMUserAgentVersion'] = plist['CFBundleVersion']
+  else:
+    plist['GTMUserAgentVersion'] = plist['CFBundleShortVersionString']
+
+
+def _RemoveGTMKeys(plist):
+  """Removes any set GTM metadata keys."""
+  _RemoveKeys(plist, 'GTMUserAgentID', 'GTMUserAgentVersion')
+
+
+def Main(argv):
+  parser = optparse.OptionParser('%prog [options]')
+  parser.add_option('--plist',
+                    dest='plist_path',
+                    action='store',
+                    type='string',
+                    default=None,
+                    help='The path of the plist to tweak.')
+  parser.add_option('--output', dest='plist_output', action='store',
+      type='string', default=None, help='If specified, the path to output ' + \
+      'the tweaked plist, rather than overwriting the input.')
+  parser.add_option('--breakpad',
+                    dest='use_breakpad',
+                    action='store',
+                    type='int',
+                    default=False,
+                    help='Enable Breakpad [1 or 0]')
+  parser.add_option(
+      '--breakpad_staging',
+      dest='use_breakpad_staging',
+      action='store_true',
+      default=False,
+      help='Use staging breakpad to upload reports. Ignored if --breakpad=0.')
+  parser.add_option('--keystone',
+                    dest='use_keystone',
+                    action='store',
+                    type='int',
+                    default=False,
+                    help='Enable Keystone [1 or 0]')
+  parser.add_option('--keystone-base-tag',
+                    default='',
+                    help='Base Keystone tag to set')
+  parser.add_option('--scm',
+                    dest='add_scm_info',
+                    action='store',
+                    type='int',
+                    default=True,
+                    help='Add SCM metadata [1 or 0]')
+  parser.add_option('--branding',
+                    dest='branding',
+                    action='store',
+                    type='string',
+                    default=None,
+                    help='The branding of the binary')
+  parser.add_option('--bundle_id',
+                    dest='bundle_identifier',
+                    action='store',
+                    type='string',
+                    default=None,
+                    help='The bundle id of the binary')
+  parser.add_option('--platform',
+                    choices=('ios', 'mac'),
+                    default='mac',
+                    help='The target platform of the bundle')
+  parser.add_option('--add-gtm-metadata',
+                    dest='add_gtm_info',
+                    action='store',
+                    type='int',
+                    default=False,
+                    help='Add GTM metadata [1 or 0]')
+  # TODO(crbug.com/1140474): Remove once iOS 14.2 reaches mass adoption.
+  parser.add_option('--lock-to-version',
+                    help='Set CFBundleVersion to given value + @MAJOR@@PATH@')
+  parser.add_option(
+      '--version-overrides',
+      action='append',
+      help='Key-value pair to override specific component of version '
+      'like key=value (can be passed multiple time to configure '
+      'more than one override)')
+  parser.add_option('--format',
+                    choices=('binary1', 'xml1'),
+                    default='xml1',
+                    help='Format to use when writing property list '
+                    '(default: %(default)s)')
+  parser.add_option('--version',
+                    dest='version',
+                    action='store',
+                    type='string',
+                    default=None,
+                    help='The version string [major.minor.build.patch]')
+  (options, args) = parser.parse_args(argv)
+
+  if len(args) > 0:
+    print(parser.get_usage(), file=sys.stderr)
+    return 1
+
+  if not options.plist_path:
+    print('No --plist specified.', file=sys.stderr)
+    return 1
+
+  # Read the plist into its parsed format. Convert the file to 'xml1' as
+  # plistlib only supports that format in Python 2.7.
+  with tempfile.NamedTemporaryFile() as temp_info_plist:
+    if sys.version_info.major == 2:
+      retcode = _ConvertPlist(options.plist_path, temp_info_plist.name, 'xml1')
+      if retcode != 0:
+        return retcode
+      plist = plistlib.readPlist(temp_info_plist.name)
+    else:
+      with open(options.plist_path, 'rb') as f:
+        plist = plistlib.load(f)
+
+  # Convert overrides.
+  overrides = {}
+  if options.version_overrides:
+    for pair in options.version_overrides:
+      if not '=' in pair:
+        print('Invalid value for --version-overrides:', pair, file=sys.stderr)
+        return 1
+      key, value = pair.split('=', 1)
+      overrides[key] = value
+      if key not in ('MAJOR', 'MINOR', 'BUILD', 'PATCH'):
+        print('Unsupported key for --version-overrides:', key, file=sys.stderr)
+        return 1
+
+  if options.platform == 'mac':
+    version_format_for_key = {
+        # Add public version info so "Get Info" works.
+        'CFBundleShortVersionString': '@MAJOR@.@MINOR@.@BUILD@.@PATCH@',
+
+        # Honor the 429496.72.95 limit.  The maximum comes from splitting
+        # 2^32 - 1 into  6, 2, 2 digits.  The limitation was present in Tiger,
+        # but it could have been fixed in later OS release, but hasn't been
+        # tested (it's easy enough to find out with "lsregister -dump).
+        # http://lists.apple.com/archives/carbon-dev/2006/Jun/msg00139.html
+        # BUILD will always be an increasing value, so BUILD_PATH gives us
+        # something unique that meetings what LS wants.
+        'CFBundleVersion': '@BUILD@.@PATCH@',
+    }
+  else:
+    # TODO(crbug.com/1140474): Remove once iOS 14.2 reaches mass adoption.
+    if options.lock_to_version:
+      # Pull in the PATCH number and format it to 3 digits.
+      VERSION_TOOL = os.path.join(TOP, 'build/util/version.py')
+      VERSION_FILE = os.path.join(TOP, 'chrome/VERSION')
+      (stdout,
+       retval) = _GetOutput([VERSION_TOOL, '-f', VERSION_FILE, '-t', '@PATCH@'])
+      if retval != 0:
+        return 2
+      patch = '{:03d}'.format(int(stdout))
+      version_format_for_key = {
+          'CFBundleShortVersionString': '@MAJOR@.@BUILD@.@PATCH@',
+          'CFBundleVersion': options.lock_to_version + '.@MAJOR@' + patch
+      }
+    else:
+      version_format_for_key = {
+          'CFBundleShortVersionString': '@MAJOR@.@BUILD@.@PATCH@',
+          'CFBundleVersion': '@MAJOR@.@MINOR@.@BUILD@.@PATCH@'
+      }
+
+  if options.use_breakpad:
+    version_format_for_key['BreakpadVersion'] = \
+        '@MAJOR@.@MINOR@.@BUILD@.@PATCH@'
+
+  # Insert the product version.
+  if not _AddVersionKeys(plist,
+                         version_format_for_key,
+                         version=options.version,
+                         overrides=overrides):
+    return 2
+
+  # Add Breakpad if configured to do so.
+  if options.use_breakpad:
+    if options.branding is None:
+      print('Use of Breakpad requires branding.', file=sys.stderr)
+      return 1
+    # Map "target_os" passed from gn via the --platform parameter
+    # to the platform as known by breakpad.
+    platform = {'mac': 'Mac', 'ios': 'iOS'}[options.platform]
+    _AddBreakpadKeys(plist, options.branding, platform,
+                     options.use_breakpad_staging)
+  else:
+    _RemoveBreakpadKeys(plist)
+
+  # Add Keystone if configured to do so.
+  if options.use_keystone:
+    if options.bundle_identifier is None:
+      print('Use of Keystone requires the bundle id.', file=sys.stderr)
+      return 1
+    _AddKeystoneKeys(plist, options.bundle_identifier,
+                     options.keystone_base_tag)
+  else:
+    _RemoveKeystoneKeys(plist)
+
+  # Adds or removes any SCM keys.
+  if not _DoSCMKeys(plist, options.add_scm_info):
+    return 3
+
+  # Add GTM metadata keys.
+  if options.add_gtm_info:
+    _AddGTMKeys(plist, options.platform)
+  else:
+    _RemoveGTMKeys(plist)
+
+  output_path = options.plist_path
+  if options.plist_output is not None:
+    output_path = options.plist_output
+
+  # Now that all keys have been mutated, rewrite the file.
+  # Convert Info.plist to the format requested by the --format flag. Any
+  # format would work on Mac but iOS requires specific format.
+  if sys.version_info.major == 2:
+    with tempfile.NamedTemporaryFile() as temp_info_plist:
+      plistlib.writePlist(plist, temp_info_plist.name)
+      return _ConvertPlist(temp_info_plist.name, output_path, options.format)
+  with open(output_path, 'wb') as f:
+    plist_format = {'binary1': plistlib.FMT_BINARY, 'xml1': plistlib.FMT_XML}
+    plistlib.dump(plist, f, fmt=plist_format[options.format])
+
+
+if __name__ == '__main__':
+  # TODO(https://crbug.com/941669): Temporary workaround until all scripts use
+  # python3 by default.
+  if sys.version_info[0] < 3:
+    os.execvp('python3', ['python3'] + sys.argv)
+  sys.exit(Main(sys.argv[1:]))
diff --git a/third_party/libwebrtc/build/apple/write_pkg_info.py b/third_party/libwebrtc/build/apple/write_pkg_info.py
new file mode 100644
index 0000000000..8d07cdb311
--- /dev/null
+++ b/third_party/libwebrtc/build/apple/write_pkg_info.py
@@ -0,0 +1,54 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import argparse
+import os
+import plist_util
+import sys
+
+# This script creates a PkgInfo file for an OS X .app bundle's plist.
+# Usage: python write_pkg_info.py --plist Foo.app/Contents/Info.plist \
+#           --output Foo.app/Contents/PkgInfo
+
+
+def Main():
+  parser = argparse.ArgumentParser(
+      description='A script to write PkgInfo files for .app bundles.')
+  parser.add_argument('--plist',
+                      required=True,
+                      help='Path to the Info.plist for the .app.')
+  parser.add_argument('--output',
+                      required=True,
+                      help='Path to the desired output file.')
+  args = parser.parse_args()
+
+  # Remove the output if it exists already.
+  if os.path.exists(args.output):
+    os.unlink(args.output)
+
+  plist = plist_util.LoadPList(args.plist)
+  package_type = plist['CFBundlePackageType']
+  if package_type != 'APPL':
+    raise ValueError('Expected CFBundlePackageType to be %s, got %s' % \
+        ('APPL', package_type))
+
+  # The format of PkgInfo is eight characters, representing the bundle type
+  # and bundle signature, each four characters. If that is missing, four
+  # '?' characters are used instead.
+  signature_code = plist.get('CFBundleSignature', '????')
+  if len(signature_code) != 4:
+    raise ValueError('CFBundleSignature should be exactly four characters, ' +
+                     'got %s' % signature_code)
+
+  with open(args.output, 'w') as fp:
+    fp.write('%s%s' % (package_type, signature_code))
+  return 0
+
+
+if __name__ == '__main__':
+  # TODO(https://crbug.com/941669): Temporary workaround until all scripts use
+  # python3 by default.
+  if sys.version_info[0] < 3:
+    os.execvp('python3', ['python3'] + sys.argv)
+  sys.exit(Main())
diff --git a/third_party/libwebrtc/build/apple/xcrun.py b/third_party/libwebrtc/build/apple/xcrun.py
new file mode 100755
index 0000000000..71bf50c352
--- /dev/null
+++ b/third_party/libwebrtc/build/apple/xcrun.py
@@ -0,0 +1,52 @@
+#!/usr/bin/python3
+# Copyright 2020 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+"""
+Wrapper around xcrun adding support for --developer-dir parameter to set
+the DEVELOPER_DIR environment variable, and for converting paths relative
+to absolute (since this is required by most of the tool run via xcrun).
+"""
+
+import argparse
+import os
+import subprocess
+import sys
+
+
+def xcrun(command, developer_dir):
+  environ = dict(os.environ)
+  if developer_dir:
+    environ['DEVELOPER_DIR'] = os.path.abspath(developer_dir)
+
+  processed_args = ['/usr/bin/xcrun']
+  for arg in command:
+    if os.path.exists(arg):
+      arg = os.path.abspath(arg)
+    processed_args.append(arg)
+
+  process = subprocess.Popen(processed_args,
+                             stdout=subprocess.PIPE,
+                             stderr=subprocess.PIPE,
+                             universal_newlines=True,
+                             env=environ)
+
+  stdout, stderr = process.communicate()
+  sys.stdout.write(stdout)
+  if process.returncode:
+    sys.stderr.write(stderr)
+    sys.exit(process.returncode)
+
+
+def main(args):
+  parser = argparse.ArgumentParser(add_help=False)
+  parser.add_argument(
+      '--developer-dir',
+      help='path to developer dir to use for the invocation of xcrun')
+
+  parsed, remaining_args = parser.parse_known_args(args)
+  xcrun(remaining_args, parsed.developer_dir)
+
+
+if __name__ == '__main__':
+  main(sys.argv[1:])