Get rid of view_messages.h includes in chrome\renderer.

chrome/renderer/page_load_histograms.h

 // Copyright (c) 2011 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_RENDERER_PAGE_LOAD_HISTOGRAMS_H_
 #define CHROME_RENDERER_PAGE_LOAD_HISTOGRAMS_H_
 
 #include "base/basictypes.h"
 #include "content/public/renderer/render_view_observer.h"
 
 class RendererHistogramSnapshots;
 
 namespace content {
 class NavigationState;
 }
 
 class PageLoadHistograms : public content::RenderViewObserver {
  public:
   PageLoadHistograms(content::RenderView* render_view,
                      RendererHistogramSnapshots* histogram_snapshots);
 
  private:
   // RenderViewObserver implementation.
-  virtual void FrameWillClose(WebKit::WebFrame* frame);
-  virtual bool OnMessageReceived(const IPC::Message& message);
+  virtual void FrameWillClose(WebKit::WebFrame* frame) OVERRIDE;
+  virtual void ClosePage() OVERRIDE;
 
   // Dump all page load histograms appropriate for the given frame.
   //
   // This method will only dump once-per-instance, so it is safe to call
   // multiple times.
   //
   // The time points we keep are
   //    request: time document was requested by user
   //    start: time load of document started
   //    commit: time load of document started
@@ skipping 18 matching lines @@
   // These are per-page-load counts, reset to 0 after they are dumped.
   int cross_origin_access_count_;
   int same_origin_access_count_;
 
   RendererHistogramSnapshots* histogram_snapshots_;
 
   DISALLOW_COPY_AND_ASSIGN(PageLoadHistograms);
 };
 
 #endif  // CHROME_RENDERER_PAGE_LOAD_HISTOGRAMS_H_