Add new IPC for searchbox to pipe SearchBox NavigateContentWindow calls to the browser.

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..e66ff5fd704b2e877efb971f77f17204d900a5e4 100644
--- a/chrome/browser/ui/browser_instant_controller.h
+++ b/chrome/browser/ui/browser_instant_controller.h
@@ -84,6 +84,9 @@ class BrowserInstantController : public content::NotificationObserver,
   // Invoked by |instant_| to update theme information for preview.
   void UpdateThemeInfoForPreview();
 
+  // Invoked by the InstantController when it wants to open a URL.
+  void OpenURLInCurrentTab(const GURL& url, content::PageTransition transition);
+
  private:
   // Sets the value of |instant_| based on value from profile. Invoked
   // on pref change.