Implement sidebar support for extension action popups

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/enterprise_platform_keys/enterprise_platform_keys_api.cc',
       'browser/extensions/api/enterprise_platform_keys/enterprise_platform_keys_api.h',
       'browser/extensions/api/enterprise_platform_keys_private/enterprise_platform_keys_private_api.cc',
@@ skipping 758 matching lines @@
       'browser/extensions/proxy_overridden_bubble_controller.cc',
       'browser/extensions/proxy_overridden_bubble_controller.h',
       'browser/extensions/settings_api_bubble_controller.cc',
       'browser/extensions/settings_api_bubble_controller.h',
       'browser/extensions/settings_api_helpers.cc',
       'browser/extensions/settings_api_helpers.h',
       'browser/extensions/shared_module_service.cc',
       'browser/extensions/shared_module_service.h',
       'browser/extensions/shared_user_script_master.cc',
       'browser/extensions/shared_user_script_master.h',
+      'browser/extensions/sidebar_container.cc',
+      'browser/extensions/sidebar_container.h',
+      'browser/extensions/sidebar_manager.cc',
+      'browser/extensions/sidebar_manager.h',
+      'browser/extensions/sidebar_manager_observer.h',
       'browser/extensions/signin/gaia_auth_extension_loader.cc',
       'browser/extensions/signin/gaia_auth_extension_loader.h',
       'browser/extensions/signin/scoped_gaia_auth_extension.cc',
       'browser/extensions/signin/scoped_gaia_auth_extension.h',
       'browser/extensions/standard_management_policy_provider.cc',
       'browser/extensions/standard_management_policy_provider.h',
       'browser/extensions/startup_helper.cc',
       'browser/extensions/startup_helper.h',
       'browser/extensions/state_store_notification_observer.cc',
       'browser/extensions/state_store_notification_observer.h',
@@ skipping 300 matching lines @@
           ],
         }, {  # use_brlapi==0
           'sources': [
             'browser/extensions/api/braille_display_private/braille_controller_stub.cc',
           ],
         }],
       ],
     },
   ],
 }