content: Cleanup class/struct forward declarations

content/browser/frame_host/cross_process_frame_connector.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 CONTENT_BROWSER_FRAME_HOST_CROSS_PROCESS_FRAME_CONNECTOR_H_
 #define CONTENT_BROWSER_FRAME_HOST_CROSS_PROCESS_FRAME_CONNECTOR_H_
 
 #include <stdint.h>
 
 #include "cc/output/compositor_frame.h"
@@ skipping 11 matching lines @@
 class SurfaceId;
 struct SurfaceSequence;
 }
 
 namespace IPC {
 class Message;
 }
 
 namespace content {
 class RenderFrameProxyHost;
-class RenderWidgetHostImpl;
 class RenderWidgetHostViewBase;
 class RenderWidgetHostViewChildFrame;
 class WebCursor;
 
 // CrossProcessFrameConnector provides the platform view abstraction for
 // RenderWidgetHostViewChildFrame allowing RWHVChildFrame to remain ignorant
 // of RenderFrameHost.
 //
 // The RenderWidgetHostView of an out-of-process child frame needs to
 // communicate with the RenderFrameProxyHost representing this frame in the
@@ skipping 118 matching lines @@
 
   gfx::Rect child_frame_rect_;
 
   bool is_scroll_bubbling_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_CROSS_PROCESS_FRAME_CONNECTOR_H_