Prerender Instant search base url on omnibox focus event

chrome/browser/ui/browser_instant_controller.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/ui/browser_instant_controller.h"
 
 #include "base/bind.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_web_ui.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 93 matching lines @@
 }
 
 content::WebContents* BrowserInstantController::GetActiveWebContents() const {
   return browser_->tab_strip_model()->GetActiveWebContents();
 }
 
 void BrowserInstantController::ActiveTabChanged() {
   instant_.ActiveTabChanged();
 }
 
+void BrowserInstantController::TabInsertedAt(content::WebContents* contents,
+                                             int index,
+                                             bool foreground) {
+  if (foreground) {
+    InstantSearchPrerenderer* prerenderer =
+        GetInstantSearchPrerenderer(profile());
+    if (prerenderer)
+      prerenderer->Init(
+          contents->GetController().GetSessionStorageNamespaceMap(),
+          contents->GetContainerBounds().size());
+  }
+}
+
 void BrowserInstantController::TabDeactivated(content::WebContents* contents) {
   instant_.TabDeactivated(contents);
 
   InstantSearchPrerenderer* prerenderer =
       GetInstantSearchPrerenderer(profile());
   if (prerenderer)
     prerenderer->Cancel();
 }
 
 void BrowserInstantController::ModelChanged(
@@ skipping 34 matching lines @@
     content::RenderProcessHost* rph = contents->GetRenderProcessHost();
     instant_service->SendSearchURLsToRenderer(rph);
 
     // Reload the contents to ensure that it gets assigned to a non-priviledged
     // renderer.
     if (!instant_service->IsInstantProcess(rph->GetID()))
       continue;
     contents->GetController().Reload(false);
   }
 }