Revert r276792 - "Hook PushMessagingMessageFilter up to GCMDriver"

android_webview/browser/aw_browser_context.cc

 // Copyright (c) 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.
 
 #include "android_webview/browser/aw_browser_context.h"
 
 #include "android_webview/browser/aw_browser_permission_request_delegate.h"
 #include "android_webview/browser/aw_form_database_service.h"
 #include "android_webview/browser/aw_pref_store.h"
 #include "android_webview/browser/aw_quota_manager_bridge.h"
@@ skipping 300 matching lines @@
 
 content::BrowserPluginGuestManager* AwBrowserContext::GetGuestManager() {
   return NULL;
 }
 
 quota::SpecialStoragePolicy* AwBrowserContext::GetSpecialStoragePolicy() {
   // Intentionally returning NULL as 'Extensions' and 'Apps' not supported.
   return NULL;
 }
 
-content::PushMessagingService* AwBrowserContext::GetPushMessagingService() {
-  // TODO(johnme): Support push messaging in WebView.
-  return NULL;
-}
-
 void AwBrowserContext::RebuildTable(
     const scoped_refptr<URLEnumerator>& enumerator) {
   // Android WebView rebuilds from WebChromeClient.getVisitedHistory. The client
   // can change in the lifetime of this WebView and may not yet be set here.
   // Therefore this initialization path is not used.
   enumerator->OnComplete(true);
 }
 
 }  // namespace android_webview