[Clean up] Remove unused PushMessagingAPI class member function.

chrome/browser/extensions/api/push_messaging/push_messaging_api.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_PUSH_MESSAGING_PUSH_MESSAGING_API_H__
 #define CHROME_BROWSER_EXTENSIONS_API_PUSH_MESSAGING_PUSH_MESSAGING_API_H__
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 100 matching lines @@
   // Convenience method to get the PushMessagingAPI for a profile.
   static PushMessagingAPI* Get(Profile* profile);
 
   // ProfileKeyedService implementation.
   virtual void Shutdown() OVERRIDE;
 
   // For testing purposes.
   PushMessagingEventRouter* GetEventRouterForTest();
 
  private:
-  void InitializeEventRouter();
-
   // Created at ExtensionService startup.
   scoped_ptr<PushMessagingEventRouter> push_messaging_event_router_;
 
   DISALLOW_COPY_AND_ASSIGN(PushMessagingAPI);
 };
 
 }  // namespace extension
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_PUSH_MESSAGING_PUSH_MESSAGING_API_H__