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diff --git a/toolkit/crashreporter/google-breakpad/src/common/linux/file_id.h b/toolkit/crashreporter/google-breakpad/src/common/linux/file_id.h
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+// Copyright (c) 2006, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// file_id.h: Return a unique identifier for a file
+//
+
+#ifndef COMMON_LINUX_FILE_ID_H__
+#define COMMON_LINUX_FILE_ID_H__
+
+#include <limits.h>
+#include <string>
+
+#include "common/linux/guid_creator.h"
+#include "common/memory_allocator.h"
+#include "common/using_std_string.h"
+
+namespace google_breakpad {
+
+// GNU binutils' ld defaults to 'sha1', which is 160 bits == 20 bytes,
+// so this is enough to fit that, which most binaries will use.
+// This is just a sensible default for auto_wasteful_vector so most
+// callers can get away with stack allocation.
+static const size_t kDefaultBuildIdSize = 20;
+
+class FileID {
+ public:
+  explicit FileID(const char* path);
+  ~FileID() {}
+
+  // Load the identifier for the elf file path specified in the constructor into
+  // |identifier|.
+  //
+  // The current implementation will look for a .note.gnu.build-id
+  // section and use that as the file id, otherwise it falls back to
+  // XORing the first 4096 bytes of the .text section to generate an identifier.
+  bool ElfFileIdentifier(wasteful_vector<uint8_t>& identifier);
+
+  // Load the identifier for the elf file mapped into memory at |base| into
+  // |identifier|. Return false if the identifier could not be created for this
+  // file.
+  static bool ElfFileIdentifierFromMappedFile(
+      const void* base,
+      wasteful_vector<uint8_t>& identifier);
+
+  // Convert the |identifier| data to a string.  The string will
+  // be formatted as a UUID in all uppercase without dashes.
+  // (e.g., 22F065BBFC9C49F780FE26A7CEBD7BCE).
+  static string ConvertIdentifierToUUIDString(
+      const wasteful_vector<uint8_t>& identifier);
+
+  // Convert the entire |identifier| data to a hex string.
+  static string ConvertIdentifierToString(
+      const wasteful_vector<uint8_t>& identifier);
+
+ private:
+  // Storage for the path specified
+  string path_;
+};
+
+}  // namespace google_breakpad
+
+#endif  // COMMON_LINUX_FILE_ID_H__