chrome: Cleanup class/struct forward declarations

chrome/browser/ui/webui/invalidations_message_handler.h

 // Copyright 2014 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_UI_WEBUI_INVALIDATIONS_MESSAGE_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_INVALIDATIONS_MESSAGE_HANDLER_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/values.h"
 #include "components/invalidation/impl/invalidation_logger_observer.h"
 #include "components/invalidation/public/invalidation_util.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
-class Profile;
-
 namespace invalidation {
 class InvalidationLogger;
 }  // namespace invalidation
 
-namespace syncer {
-class InvalidationHandler;
-}  // namespace syncer
-
 // The implementation for the chrome://invalidations page.
 class InvalidationsMessageHandler
     : public content::WebUIMessageHandler,
       public invalidation::InvalidationLoggerObserver {
  public:
   InvalidationsMessageHandler();
   ~InvalidationsMessageHandler() override;
 
   // Implementation of InvalidationLoggerObserver.
   void OnRegistrationChange(
@@ skipping 24 matching lines @@
   // Used to get the information necessary to display to the JS and to
   // register ourselves as Observers for any notifications.
   invalidation::InvalidationLogger* logger_;
 
   base::WeakPtrFactory<InvalidationsMessageHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InvalidationsMessageHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_INVALIDATIONS_MESSAGE_HANDLER_H_