Moved the following IPCs out of chrome into content where they are handled by

chrome/browser/prerender/prerender_tab_helper.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_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_
 
 #include "content/browser/tab_contents/tab_contents_observer.h"
 
 #include "base/time.h"
 
 class TabContentsWrapper;
 class GURL;
 
 namespace prerender {
 
 class PrerenderContents;
 class PrerenderManager;
 
 // PrerenderTabHelper is responsible for recording perceived pageload times
 // to compare PLT's with prerendering enabled and disabled.
 class PrerenderTabHelper : public TabContentsObserver {
  public:
   explicit PrerenderTabHelper(TabContentsWrapper* tab);
   virtual ~PrerenderTabHelper();
 
   // TabContentsObserver implementation.
   virtual void ProvisionalChangeToMainFrameUrl(const GURL& url,
                                                bool has_opener_set) OVERRIDE;
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void DidStopLoading() OVERRIDE;
 
   // Called when this prerendered TabContents has just been swapped in.
   void PrerenderSwappedIn();
 
+  void DidStartProvisionalLoadForFrame(int64 frame_id,
+                                       bool is_main_frame,
+                                       bool has_opener_set,
+                                       const GURL& url);
+
+  void UpdateTargetURL(int32 page_id, const GURL& url);
+
  private:
   // The data we store for a hover (time the hover occurred & URL).
   class HoverData;
 
-  // Message handler.
-  void OnDidStartProvisionalLoadForFrame(int64 frame_id,
-                                         bool main_frame,
-                                         bool has_opener_set,
-                                         const GURL& url);
-
-  void OnMsgUpdateTargetURL(int32 page_id, const GURL& url);
-
   // Retrieves the PrerenderManager, or NULL, if none was found.
   PrerenderManager* MaybeGetPrerenderManager() const;
 
   // Checks with the PrerenderManager if the specified URL has been preloaded,
   // and if so, swap the RenderViewHost with the preload into this TabContents
   // object.
   bool MaybeUsePrerenderedPage(const GURL& url, bool has_opener_set);
 
   // Returns whether the TabContents being observed is currently prerendering.
   bool IsPrerendering();
@@ skipping 18 matching lines @@
   // Information about the current hover independent of thresholds.
   GURL current_hover_url_;
   base::TimeTicks current_hover_time_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderTabHelper);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_