Introduce WebRequestEventRouterDelegate.

chrome/chrome_browser_extensions.gypi

 # Copyright (c) 2013 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.
 
 {
   'variables': {
     'chrome_browser_extensions_chromeos_sources': [
       'browser/extensions/api/diagnostics/diagnostics_api.cc',
       'browser/extensions/api/diagnostics/diagnostics_api.h',
       'browser/extensions/api/diagnostics/diagnostics_api_chromeos.cc',
@@ skipping 461 matching lines @@
       'browser/extensions/api/top_sites/top_sites_api.cc',
       'browser/extensions/api/top_sites/top_sites_api.h',
       'browser/extensions/api/web_navigation/frame_navigation_state.cc',
       'browser/extensions/api/web_navigation/frame_navigation_state.h',
       'browser/extensions/api/web_navigation/web_navigation_api.cc',
       'browser/extensions/api/web_navigation/web_navigation_api.h',
       'browser/extensions/api/web_navigation/web_navigation_api_constants.cc',
       'browser/extensions/api/web_navigation/web_navigation_api_constants.h',
       'browser/extensions/api/web_navigation/web_navigation_api_helpers.cc',
       'browser/extensions/api/web_navigation/web_navigation_api_helpers.h',
+      'browser/extensions/api/web_request/chrome_extension_web_request_event_router_delegate.cc',
+      'browser/extensions/api/web_request/chrome_extension_web_request_event_router_delegate.h',
       'browser/extensions/api/web_request/form_data_parser.cc',
       'browser/extensions/api/web_request/form_data_parser.h',
       'browser/extensions/api/web_request/upload_data_presenter.cc',
       'browser/extensions/api/web_request/upload_data_presenter.h',
       'browser/extensions/api/web_request/web_request_api.cc',
       'browser/extensions/api/web_request/web_request_api.h',
       'browser/extensions/api/web_request/web_request_time_tracker.cc',
       'browser/extensions/api/web_request/web_request_time_tracker.h',
       'browser/extensions/api/web_view/chrome_web_view_internal_api.cc',
       'browser/extensions/api/web_view/chrome_web_view_internal_api.h',
@@ skipping 602 matching lines @@
           ],
         }, {  # use_brlapi==0
           'sources': [
             'browser/extensions/api/braille_display_private/braille_controller_stub.cc',
           ],
         }],
       ],
     },
   ],
 }