Make the renderer-side prerendering code use RenderFrames instead of RenderViews.

chrome/browser/prerender/prerender_contents.h

Index: chrome/browser/prerender/prerender_contents.h
===================================================================
--- chrome/browser/prerender/prerender_contents.h	(revision 239848)
+++ chrome/browser/prerender/prerender_contents.h	(working copy)
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_
 
+#include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ -213,6 +214,10 @@
       const content::SessionStorageNamespace* session_storage_namespace) const;
 
   // content::WebContentsObserver implementation.
+  virtual void RenderFrameCreated(
+      content::RenderFrameHost* render_frame_host) OVERRIDE;
+  virtual void RenderFrameDeleted(
+      content::RenderFrameHost* render_frame_host) OVERRIDE;
   virtual void DidStopLoading(
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidStartProvisionalLoadForFrame(
@@ -435,6 +440,9 @@
   scoped_refptr<content::SessionStorageNamespace>
       alias_session_storage_namespace;
 
+  // The RenderFrameHosts for prerender_contents_.
+  std::set<content::RenderFrameHost*> render_frame_hosts_;
+
   DISALLOW_COPY_AND_ASSIGN(PrerenderContents);
 };