Make BrowserMessageFilter support dispatching messages on different threads.

chrome/chrome_browser.gypi

 # Copyright (c) 2010 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 289 matching lines @@
         'browser/bookmarks/bookmark_storage.cc',
         'browser/bookmarks/bookmark_storage.h',
         'browser/bookmarks/bookmark_utils.cc',
         'browser/bookmarks/bookmark_utils.h',
         'browser/bookmarks/recently_used_folders_combo_model.cc',
         'browser/bookmarks/recently_used_folders_combo_model.h',
         'browser/browser_about_handler.cc',
         'browser/browser_about_handler.h',
         'browser/browser_child_process_host.cc',
         'browser/browser_child_process_host.h',
-        'browser/browser_io_message_filter.cc',
-        'browser/browser_io_message_filter.h',
         'browser/browser_main.cc',
         'browser/browser_main_gtk.cc',
         'browser/browser_main_gtk.h',
         'browser/browser_main_mac.mm',
         'browser/browser_main_posix.cc',
         'browser/browser_main_posix.h',
         'browser/browser_main_win.cc',
         'browser/browser_main_win.h',
+        'browser/browser_message_filter.cc',
+        'browser/browser_message_filter.h',
         'browser/browser_process.cc',
         'browser/browser_process.h',
         'browser/browser_process_impl.cc',
         'browser/browser_process_impl.h',
         'browser/browser_process_sub_thread.cc',
         'browser/browser_process_sub_thread.h',
         'browser/browser_signin.cc',
         'browser/browser_signin.h',
         'browser/browser_shutdown.cc',
         'browser/browser_shutdown.h',
@@ skipping 4088 matching lines @@
       ],
     },
   ],
 }
 
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 # tab-width:2
 # indent-tabs-mode:nil
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