Cleanup: Remove unneeded headers from app/

chrome/browser/renderer_host/render_widget_host_painting_observer.h

 // Copyright (c) 2009 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_RENDERER_HOST_RENDER_WIDGET_HOST_PAINTING_OBSERVER_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_PAINTING_OBSERVER_H_
 #pragma once
 
-#include "app/surface/transport_dib.h"
-
 class BackingStore;
 class RenderWidgetHost;
 class SkBitmap;
 
 namespace gfx {
 class Size;
 }
 
 // This class can be used to observe painting events for a RenderWidgetHost.
 // Its primary goal in Chrome is to allow thumbnails to be generated.
@@ skipping 12 matching lines @@
   virtual void WidgetDidReceivePaintAtSizeAck(
       RenderWidgetHost* widget,
       int tag,
       const gfx::Size& size) = 0;
 
  protected:
   virtual ~RenderWidgetHostPaintingObserver() {}
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_PAINTING_OBSERVER_H_