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

chrome/browser/ui/browser_instant_controller.h

Index: chrome/browser/ui/browser_instant_controller.h
diff --git a/chrome/browser/ui/browser_instant_controller.h b/chrome/browser/ui/browser_instant_controller.h
index 0cbaa8e7e3f2248a24bdeeedf659efaa4368533b..a064d9d86ac0907d3dc7136f72b3d4ef9c7092a2 100644
--- a/chrome/browser/ui/browser_instant_controller.h
+++ b/chrome/browser/ui/browser_instant_controller.h
@@ -76,6 +76,9 @@ class BrowserInstantController : public content::NotificationObserver,
   // Invoked by |browser_| when the active tab changes.
   void ActiveTabChanged();
 
+  // Invoked by |browser_| when it is about to open a new URL.
+  void AboutToOpenURL(content::WebContents* web_contents, const GURL& url);
+
   // Invoked by |BrowserWindow| during layout to set content height which is
   // used as theme area height, i.e. the height of the area that the entire
   // theme background image should fill up.