content: Cleanup class/struct forward declarations

content/public/browser/render_widget_host.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_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
@@ skipping 12 matching lines @@
 class Rect;
 }
 
 namespace blink {
 class WebMouseEvent;
 }
 
 namespace content {
 
 class RenderProcessHost;
-class RenderWidgetHostImpl;
 class RenderWidgetHostIterator;
 class RenderWidgetHostView;
 struct ScreenInfo;
 
 // A RenderWidgetHost manages the browser side of a browser<->renderer
 // HWND connection.  The HWND lives in the browser process, and
 // windows events are sent over IPC to the corresponding object in the
 // renderer.  The renderer paints into shared memory, which we
 // transfer to a backing store and blit to the screen when Windows
 // sends us a WM_PAINT message.
@@ skipping 211 matching lines @@
   // Get the screen info corresponding to this render widget.
   virtual void GetScreenInfo(ScreenInfo* result) = 0;
 
   // Sends a compositor proto to the render widget.
   virtual void HandleCompositorProto(const std::vector<uint8_t>& proto) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_