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

chrome/browser/prerender/prerender_tab_helper.h

Index: chrome/browser/prerender/prerender_tab_helper.h
===================================================================
--- chrome/browser/prerender/prerender_tab_helper.h	(revision 99462)
+++ chrome/browser/prerender/prerender_tab_helper.h	(working copy)
@@ -27,24 +27,22 @@
   // 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;