Split most extensions bits in ChromeRenderMessageFilter into ChromeExtensionMessageFilter.

chrome/chrome_browser.gypi

 # Copyright 2012 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',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 1821 matching lines @@
         'browser/renderer_context_menu/render_view_context_menu.h',
         'browser/renderer_context_menu/render_view_context_menu_observer.cc',
         'browser/renderer_context_menu/render_view_context_menu_observer.h',
         'browser/renderer_context_menu/spellchecker_submenu_observer.h',
         'browser/renderer_context_menu/spellchecker_submenu_observer_hunspell.cc',
         'browser/renderer_context_menu/spellchecker_submenu_observer_mac.cc',
         'browser/renderer_context_menu/spelling_bubble_model.cc',
         'browser/renderer_context_menu/spelling_bubble_model.h',
         'browser/renderer_context_menu/spelling_menu_observer.cc',
         'browser/renderer_context_menu/spelling_menu_observer.h',
+        'browser/renderer_host/chrome_extension_message_filter.cc',
+        'browser/renderer_host/chrome_extension_message_filter.h',
         'browser/renderer_host/chrome_render_message_filter.cc',
         'browser/renderer_host/chrome_render_message_filter.h',
         'browser/renderer_host/chrome_render_widget_host_view_mac_delegate.h',
         'browser/renderer_host/chrome_render_widget_host_view_mac_delegate.mm',
         'browser/renderer_host/chrome_render_widget_host_view_mac_history_swiper.h',
         'browser/renderer_host/chrome_render_widget_host_view_mac_history_swiper.mm',
         'browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc',
         'browser/renderer_host/chrome_resource_dispatcher_host_delegate.h',
         'browser/renderer_host/offline_resource_throttle.cc',
         'browser/renderer_host/offline_resource_throttle.h',
@@ skipping 898 matching lines @@
             'browser/speech/extension_api/tts_engine_extension_api.h',
           ],
         }, {
           'sources!': [
             'browser/autocomplete/keyword_extensions_delegate_impl.cc',
             'browser/autocomplete/keyword_extensions_delegate_impl.h',
             'browser/content_settings/content_settings_custom_extension_provider.cc',
             'browser/content_settings/content_settings_custom_extension_provider.h',
             'browser/content_settings/content_settings_internal_extension_provider.cc',
             'browser/content_settings/content_settings_internal_extension_provider.h',
+            'browser/renderer_host/chrome_extension_message_filter.cc',
+            'browser/renderer_host/chrome_extension_message_filter.h',
           ],
         }],
         ['enable_background==0', {
           'sources/': [
             ['exclude', '^browser/background/'],
           ],
         }],
         ['enable_task_manager==0', {
           'sources/': [
             ['exclude', '^browser/task_manager/'],
@@ skipping 1009 matching lines @@
             'package_name': 'org/chromium/chrome/browser',
             'template_deps': ['browser/android/tab_load_status.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }