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diff --git a/toolkit/crashreporter/google-breakpad/src/common/linux/memory_mapped_file.h b/toolkit/crashreporter/google-breakpad/src/common/linux/memory_mapped_file.h
deleted file mode 100644
index fa660cc91..000000000
--- a/toolkit/crashreporter/google-breakpad/src/common/linux/memory_mapped_file.h
+++ /dev/null
@@ -1,87 +0,0 @@
-// Copyright (c) 2011, 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.
-
-// memory_mapped_file.h: Define the google_breakpad::MemoryMappedFile
-// class, which maps a file into memory for read-only access.
-
-#ifndef COMMON_LINUX_MEMORY_MAPPED_FILE_H_
-#define COMMON_LINUX_MEMORY_MAPPED_FILE_H_
-
-#include <stddef.h>
-#include "common/basictypes.h"
-#include "common/memory_range.h"
-
-namespace google_breakpad {
-
-// A utility class for mapping a file into memory for read-only access of
-// the file content. Its implementation avoids calling into libc functions
-// by directly making system calls for open, close, mmap, and munmap.
-class MemoryMappedFile {
- public:
-  MemoryMappedFile();
-
-  // Constructor that calls Map() to map a file at |path| into memory.
-  // If Map() fails, the object behaves as if it is default constructed.
-  MemoryMappedFile(const char* path, size_t offset);
-
-  ~MemoryMappedFile();
-
-  // Maps a file at |path| into memory, which can then be accessed via
-  // content() as a MemoryRange object or via data(), and returns true on
-  // success. Mapping an empty file will succeed but with data() and size()
-  // returning NULL and 0, respectively. An existing mapping is unmapped
-  // before a new mapping is created.
-  bool Map(const char* path, size_t offset);
-
-  // Unmaps the memory for the mapped file. It's a no-op if no file is
-  // mapped.
-  void Unmap();
-
-  // Returns a MemoryRange object that covers the memory for the mapped
-  // file. The MemoryRange object is empty if no file is mapped.
-  const MemoryRange& content() const { return content_; }
-
-  // Returns a pointer to the beginning of the memory for the mapped file.
-  // or NULL if no file is mapped or the mapped file is empty.
-  const void* data() const { return content_.data(); }
-
-  // Returns the size in bytes of the mapped file, or zero if no file
-  // is mapped.
-  size_t size() const { return content_.length(); }
-
- private:
-  // Mapped file content as a MemoryRange object.
-  MemoryRange content_;
-
-  DISALLOW_COPY_AND_ASSIGN(MemoryMappedFile);
-};
-
-}  // namespace google_breakpad
-
-#endif  // COMMON_LINUX_MEMORY_MAPPED_FILE_H_