[WIP] Implement Notifications through Platform instead of WebFrame.

Source/modules/modules.gypi

 {
   'includes': [
     '../core/core_generated.gypi',
     'modules_generated.gypi',
   ],
   'variables': {
     # Experimental hooks for embedder to provide extra IDL and source files.
     #
     # Note: this is not a supported API. If you rely on this, you will be broken
     # from time to time as the code generator changes in backward incompatible
@@ skipping 619 matching lines @@
       'navigatorcontentutils/NavigatorContentUtils.h',
       'navigatorcontentutils/NavigatorContentUtilsClient.h',
       'netinfo/NavigatorNetworkInformation.cpp',
       'netinfo/NavigatorNetworkInformation.h',
       'netinfo/NetworkInformation.cpp',
       'netinfo/NetworkInformation.h',
       'netinfo/WorkerNavigatorNetworkInformation.cpp',
       'netinfo/WorkerNavigatorNetworkInformation.h',
       'notifications/Notification.cpp',
       'notifications/Notification.h',
-      'notifications/NotificationClient.h',
-      'notifications/NotificationController.cpp',
-      'notifications/NotificationController.h',
       'notifications/NotificationPermissionCallback.h',
       'notifications/NotificationPermissionClient.cpp',
       'notifications/NotificationPermissionClient.h',
       'performance/SharedWorkerPerformance.cpp',
       'performance/WorkerGlobalScopePerformance.cpp',
       'performance/WorkerGlobalScopePerformance.h',
       'performance/WorkerPerformance.cpp',
       'performance/WorkerPerformance.h',
       'presentation/NavigatorPresentation.cpp',
       'presentation/NavigatorPresentation.h',
@@ skipping 375 matching lines @@
       'serviceworkers/ServiceWorkerContainerTest.cpp',
       'websockets/DOMWebSocketTest.cpp',
       'websockets/NewWebSocketChannelImplTest.cpp',
       'websockets/WebSocketDeflaterTest.cpp',
       'websockets/WebSocketExtensionDispatcherTest.cpp',
       'websockets/WebSocketExtensionParserTest.cpp',
       'websockets/WebSocketPerMessageDeflateTest.cpp',
     ],
   },
 }