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

content/browser/frame_host/render_frame_host_delegate.h

Index: content/browser/frame_host/render_frame_host_delegate.h
===================================================================
--- content/browser/frame_host/render_frame_host_delegate.h	(revision 239602)
+++ content/browser/frame_host/render_frame_host_delegate.h	(working copy)
@@ -22,6 +22,12 @@
   virtual bool OnMessageReceived(RenderFrameHost* render_frame_host,
                                  const IPC::Message& message);
 
+  // Informs the delegate whenever a RenderFrameHost is created.
+  virtual void RenderFrameCreated(RenderFrameHost* render_frame_host) {}
+
+  // Informs the delegate whenever a RenderFrameHost is deleted.
+  virtual void RenderFrameDeleted(RenderFrameHost* render_frame_host) {}
+
  protected:
   virtual ~RenderFrameHostDelegate() {}
 };