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diff --git a/xpcom/build/XREAppData.h b/xpcom/build/XREAppData.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsXREAppData_h
+#define nsXREAppData_h
+
+#include <stdint.h>
+#include "mozilla/Attributes.h"
+#include "mozilla/UniquePtrExtensions.h"
+#include "nsCOMPtr.h"
+#include "nsCRTGlue.h"
+#include "nsStringFwd.h"
+#include "nsIFile.h"
+
+#if defined(XP_WIN) && defined(MOZ_SANDBOX)
+namespace sandbox {
+class BrokerServices;
+}
+#endif
+
+namespace mozilla {
+
+struct StaticXREAppData;
+
+/**
+ * Application-specific data needed to start the apprunner.
+ */
+class XREAppData {
+ public:
+  XREAppData() = default;
+  ~XREAppData() = default;
+  XREAppData(const XREAppData& aOther) { *this = aOther; }
+
+  explicit XREAppData(const StaticXREAppData& aOther) { *this = aOther; }
+
+  XREAppData& operator=(const StaticXREAppData& aOther);
+  XREAppData& operator=(const XREAppData& aOther);
+  XREAppData& operator=(XREAppData&& aOther) = default;
+
+  // Lots of code reads these fields directly like a struct, so rather
+  // than using UniquePtr directly, use an auto-converting wrapper.
+  class CharPtr {
+   public:
+    explicit CharPtr() = default;
+    explicit CharPtr(const char* v) { *this = v; }
+    CharPtr(CharPtr&&) = default;
+    ~CharPtr() = default;
+
+    CharPtr& operator=(const char* v) {
+      if (v) {
+        mValue.reset(NS_xstrdup(v));
+      } else {
+        mValue = nullptr;
+      }
+      return *this;
+    }
+    CharPtr& operator=(const CharPtr& v) {
+      *this = (const char*)v;
+      return *this;
+    }
+
+    operator const char*() const { return mValue.get(); }
+
+   private:
+    UniqueFreePtr<const char> mValue;
+  };
+
+  /**
+   * The directory of the application to be run. May be null if the
+   * xulrunner and the app are installed into the same directory.
+   */
+  nsCOMPtr<nsIFile> directory;
+
+  /**
+   * The name of the application vendor. This must be ASCII, and is normally
+   * mixed-case, e.g. "Mozilla". Optional (may be null), but highly
+   * recommended. Must not be the empty string.
+   */
+  CharPtr vendor;
+
+  /**
+   * The name of the application. This must be ASCII, and is normally
+   * mixed-case, e.g. "Firefox". Required (must not be null or an empty
+   * string).
+   */
+  CharPtr name;
+
+  /**
+   * The internal name of the application for remoting purposes. When left
+   * unspecified, "name" is used instead. This must be ASCII, and is normally
+   * lowercase, e.g. "firefox". Optional (may be null but not an empty string).
+   */
+  CharPtr remotingName;
+
+  /**
+   * The major version, e.g. "0.8.0+". Optional (may be null), but
+   * required for advanced application features such as the extension
+   * manager and update service. Must not be the empty string.
+   */
+  CharPtr version;
+
+  /**
+   * The application's build identifier, e.g. "2004051604"
+   */
+  CharPtr buildID;
+
+  /**
+   * The application's UUID. Used by the extension manager to determine
+   * compatible extensions. Optional, but required for advanced application
+   * features such as the extension manager and update service.
+   *
+   * This has traditionally been in the form
+   * "{AAAAAAAA-BBBB-CCCC-DDDD-EEEEEEEEEEEE}" but for new applications
+   * a more readable form is encouraged: "appname@vendor.tld". Only
+   * the following characters are allowed: a-z A-Z 0-9 - . @ _ { } *
+   */
+  CharPtr ID;
+
+  /**
+   * The copyright information to print for the -h commandline flag,
+   * e.g. "Copyright (c) 2003 mozilla.org".
+   */
+  CharPtr copyright;
+
+  /**
+   * Combination of NS_XRE_ prefixed flags (defined below).
+   */
+  uint32_t flags = 0;
+
+  /**
+   * The location of the XRE. XRE_main may not be able to figure this out
+   * programatically.
+   */
+  nsCOMPtr<nsIFile> xreDirectory;
+
+  /**
+   * The minimum/maximum compatible XRE version.
+   */
+  CharPtr minVersion;
+  CharPtr maxVersion;
+
+  /**
+   * The server URL to send crash reports to.
+   */
+  CharPtr crashReporterURL;
+
+  /**
+   * The profile directory that will be used. Optional (may be null). Must not
+   * be the empty string, must be ASCII. The path is split into components
+   * along the path separator characters '/' and '\'.
+   *
+   * The application data directory ("UAppData", see below) is normally
+   * composed as follows, where $HOME is platform-specific:
+   *
+   *   UAppData = $HOME[/$vendor]/$name
+   *
+   * If present, the 'profile' string will be used instead of the combination of
+   * vendor and name as follows:
+   *
+   *   UAppData = $HOME/$profile
+   */
+  CharPtr profile;
+
+  /**
+   * The application name to use in the User Agent string.
+   */
+  CharPtr UAName;
+
+  /**
+   * The URL to the source revision for this build of the application.
+   */
+  CharPtr sourceURL;
+
+  /**
+   * The URL to use to check for updates.
+   */
+  CharPtr updateURL;
+
+#if defined(XP_WIN) && defined(MOZ_SANDBOX)
+  /**
+   * Chromium sandbox BrokerServices.
+   */
+  sandbox::BrokerServices* sandboxBrokerServices = nullptr;
+#endif
+
+  // Returns a name suitable for DBUS services.
+  static void SanitizeNameForDBus(nsACString&);
+  void GetDBusAppName(nsACString&) const;
+};
+
+/**
+ * Indicates whether or not the profile migrator service may be
+ * invoked at startup when creating a profile.
+ */
+#define NS_XRE_ENABLE_PROFILE_MIGRATOR (1 << 1)
+
+/**
+ * Indicates whether or not to use Breakpad crash reporting.
+ */
+#define NS_XRE_ENABLE_CRASH_REPORTER (1 << 3)
+
+/**
+ * A static version of the XRE app data is compiled into the application
+ * so that it is not necessary to read application.ini at startup.
+ *
+ * This structure is initialized into and matches nsXREAppData
+ */
+struct StaticXREAppData {
+  const char* vendor;
+  const char* name;
+  const char* remotingName;
+  const char* version;
+  const char* buildID;
+  const char* ID;
+  const char* copyright;
+  uint32_t flags;
+  const char* minVersion;
+  const char* maxVersion;
+  const char* crashReporterURL;
+  const char* profile;
+  const char* UAName;
+  const char* sourceURL;
+  const char* updateURL;
+};
+
+}  // namespace mozilla
+
+#endif  // XREAppData_h