Pass load events from prerenders to launching elements.

chrome/browser/prerender/prerender_contents.h

Index: chrome/browser/prerender/prerender_contents.h
diff --git a/chrome/browser/prerender/prerender_contents.h b/chrome/browser/prerender/prerender_contents.h
index e264906eba7e2f77c9e4b10cad0a2443fe3e2773..1fc906582fb4254562be82f2b061122cd153b09b 100644
--- a/chrome/browser/prerender/prerender_contents.h
+++ b/chrome/browser/prerender/prerender_contents.h
@@ -75,6 +75,9 @@ class PrerenderContents : public content::NotificationObserver,
     // Signals that the prerender has started running.
     virtual void OnPrerenderStart(PrerenderContents* contents) = 0;
 
+    // Signals that the prerender has had its load event.
+    virtual void OnPrerenderStopLoading(PrerenderContents* contents);
+
     // Signals that the prerender has stopped running.
     virtual void OnPrerenderStop(PrerenderContents* contents) = 0;
 
@@ -292,6 +295,7 @@ class PrerenderContents : public content::NotificationObserver,
   // These call out to methods on our Observers, using our observer_list_. Note
   // that NotifyPrerenderStop() also clears the observer list.
   void NotifyPrerenderStart();
+  void NotifyPrerenderStopLoading();
   void NotifyPrerenderStop();
   void NotifyPrerenderAddAlias(const GURL& alias_url);
   void NotifyPrerenderCreatedMatchCompleteReplacement(