Add placeholder chrome://media-internals page.

chrome/chrome_browser.gypi

 # Copyright (c) 2011 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': 'static_library',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 3337 matching lines @@
         'browser/ui/webui/history2_ui.cc',
         'browser/ui/webui/history2_ui.h',
         'browser/ui/webui/history_ui.cc',
         'browser/ui/webui/history_ui.h',
         'browser/ui/webui/html_dialog_tab_contents_delegate.cc',
         'browser/ui/webui/html_dialog_tab_contents_delegate.h',
         'browser/ui/webui/html_dialog_ui.cc',
         'browser/ui/webui/html_dialog_ui.h',
         'browser/ui/webui/keyboard_ui.cc',
         'browser/ui/webui/keyboard_ui.h',
+        'browser/ui/webui/media_internals_ui.cc',
+        'browser/ui/webui/media_internals_ui.h',
         'browser/ui/webui/net_internals_ui.cc',
         'browser/ui/webui/net_internals_ui.h',
         'browser/ui/webui/ntp/app_launcher_handler.cc',
         'browser/ui/webui/ntp/app_launcher_handler.h',
         'browser/ui/webui/ntp/foreign_session_handler.cc',
         'browser/ui/webui/ntp/foreign_session_handler.h',
         'browser/ui/webui/ntp/most_visited_handler.cc',
         'browser/ui/webui/ntp/most_visited_handler.h',
         'browser/ui/webui/ntp/new_tab_page_sync_handler.cc',
         'browser/ui/webui/ntp/new_tab_page_sync_handler.h',
@@ skipping 1271 matching lines @@
       'hard_dependency': 1,
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: