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

chrome/browser/instant/instant_tab.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/instant/instant_tab.h"
 
 #include "chrome/browser/instant/instant_controller.h"
 
 InstantTab::InstantTab(InstantController* controller,
                        content::WebContents* contents)
@@ skipping 69 matching lines @@
   // We don't honor this call from committed tabs.
 }
 
 void InstantTab::RenderViewGone() {
   // For a commit page, a crash should not be handled differently.
 }
 
 void InstantTab::AboutToNavigateMainFrame(const GURL& url) {
   // The client is a committed tab, navigations will happen as expected.
 }
+
+void InstantTab::NavigateToURL(const GURL& url,
+                               content::PageTransition transition) {
+  controller_->NavigateToURL(url, transition);
+}