Commit instant loader when the instant page navigates away from instant URL.

chrome/browser/instant/instant_controller.h

Index: chrome/browser/instant/instant_controller.h
diff --git a/chrome/browser/instant/instant_controller.h b/chrome/browser/instant/instant_controller.h
index 30821de4f88ff99fc40f90faac6eea4ebe849b00..0f37e86129412047e4ac7864ac4b51c5dcae1a1d 100644
--- a/chrome/browser/instant/instant_controller.h
+++ b/chrome/browser/instant/instant_controller.h
@@ -145,6 +145,9 @@ class InstantController {
   // Invoked by the InstantLoader when its RenderView crashes.
   void InstantLoaderRenderViewGone();
 
+  // Invoked by InstantLoader when the instant page is about to navigate.
+  void InstantLoaderAboutToNavigateMainFrame(const GURL& url);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(InstantTest, OmniboxFocusLoadsInstant);
   FRIEND_TEST_ALL_PREFIXES(InstantTest, NonInstantSearchProvider);