content: Cleanup class/struct forward declarations

content/browser/gamepad/gamepad_service.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 CONTENT_BROWSER_GAMEPAD_GAMEPAD_SERVICE_H_
 #define CONTENT_BROWSER_GAMEPAD_GAMEPAD_SERVICE_H_
 
 #include <memory>
 #include <set>
 
@@ skipping 11 matching lines @@
 
 namespace device {
 class GamepadConsumer;
 class GamepadDataFetcher;
 class GamepadProvider;
 }
 
 namespace content {
 
 class GamepadServiceTestConstructor;
-class RenderProcessHost;
 
 // Owns the GamepadProvider (the background polling thread) and keeps track of
 // the number of consumers currently using the data (and pausing the provider
 // when not in use).
 class CONTENT_EXPORT GamepadService
     : public device::GamepadConnectionChangeClient {
  public:
   // Returns the GamepadService singleton.
   static GamepadService* GetInstance();
 
@@ skipping 88 matching lines @@
   int num_active_consumers_;
 
   bool gesture_callback_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(GamepadService);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_SERVICE_H_