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 34e78ab1e86101103bbee3e637b643aefa4cef20..b3b8277f27ec3e6c0c362f08a68ae0c4fb8e7459 100644
--- a/chrome/browser/instant/instant_controller.h
+++ b/chrome/browser/instant/instant_controller.h
@@ -142,6 +142,9 @@ class InstantController {
   // user clicking on it.
   void InstantLoaderContentsFocused();
 
+  // 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);