content: Cleanup class/struct forward declarations

content/renderer/input/input_handler_manager_client.h

 // Copyright 2013 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_RENDERER_INPUT_INPUT_HANDLER_MANAGER_CLIENT_H_
 #define CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_CLIENT_H_
 
 #include "base/callback.h"
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "content/common/content_export.h"
 #include "content/common/input/input_event_ack_state.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "ui/events/blink/scoped_web_input_event.h"
 #include "ui/gfx/geometry/vector2d_f.h"
 
-namespace cc {
-class InputHandler;
-}
-
 namespace ui {
 class LatencyInfo;
 class SynchronousInputHandlerProxy;
 struct DidOverscrollParams;
 }
 
 namespace content {
 class InputHandlerManager;
 
 class CONTENT_EXPORT InputHandlerManagerClient {
@@ skipping 41 matching lines @@
  protected:
   SynchronousInputHandlerProxyClient() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SynchronousInputHandlerProxyClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_CLIENT_H_