Remove call of PrerenderTracker::TryCancelOnIOThread in ChromeContentBrowserClient::CanCreateWindow…

chrome/browser/prerender/prerender_contents.cc

 // Copyright (c) 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/prerender/prerender_contents.h"
 
 #include <algorithm>
 #include <functional>
 #include <utility>
 
@@ skipping 74 matching lines @@
   virtual void CanDownload(
       RenderViewHost* render_view_host,
       int request_id,
       const std::string& request_method,
       const base::Callback<void(bool)>& callback) OVERRIDE {
     prerender_contents_->Destroy(FINAL_STATUS_DOWNLOAD);
     // Cancel the download.
     callback.Run(false);
   }
 
+   virtual bool ShouldCreateWebContents(
+       WebContents* web_contents,
+       int route_id,
+       WindowContainerType window_container_type,
+       const base::string16& frame_name,
+       const GURL& target_url,
+       const std::string& partition_id,
+       SessionStorageNamespace* session_storage_namespace) OVERRIDE {
+    // Since we don't want to permit child windows that would have a
+    // window.opener property, terminate prerendering.
+    prerender_contents_->Destroy(FINAL_STATUS_CREATE_NEW_WINDOW);
+    // Cancel the popup.
+    return false;
+  }
+
   virtual bool OnGoToEntryOffset(int offset) OVERRIDE {
     // This isn't allowed because the history merge operation
     // does not work if there are renderer issued challenges.
     // TODO(cbentzel): Cancel in this case? May not need to do
     // since render-issued offset navigations are not guaranteed,
     // but indicates that the page cares about the history.
     return false;
   }
 
   virtual void JSOutOfMemory(WebContents* tab) OVERRIDE {
@@ skipping 663 matching lines @@
     return NULL;
   return prerender_contents()->GetController().
       GetDefaultSessionStorageNamespace();
 }
 
 void PrerenderContents::OnCancelPrerenderForPrinting() {
   Destroy(FINAL_STATUS_WINDOW_PRINT);
 }
 
 }  // namespace prerender