Make browser_handles_top_level_requests synchronous.

content/browser/tab_contents/tab_contents.h

 // 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.
 
 #ifndef CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #define CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 274 matching lines @@
   virtual void RequestOpenURL(const GURL& url,
                               const content::Referrer& referrer,
                               WindowOpenDisposition disposition,
                               int64 source_frame_id) OVERRIDE;
   virtual void RequestTransferURL(
       const GURL& url,
       const content::Referrer& referrer,
       WindowOpenDisposition disposition,
       int64 source_frame_id,
       const content::GlobalRequestID& transferred_global_request_id) OVERRIDE;
+  virtual bool ShouldIgnoreNavigation(const GURL& url,
+                              const content::Referrer& referrer,
+                              WindowOpenDisposition disposition,
+                              int64 source_frame_id,
+                              bool is_content_initiated) OVERRIDE;
   virtual void RunJavaScriptMessage(content::RenderViewHost* rvh,
                                     const string16& message,
                                     const string16& default_prompt,
                                     const GURL& frame_url,
                                     ui::JavascriptMessageType type,
                                     IPC::Message* reply_msg,
                                     bool* did_suppress_message) OVERRIDE;
   virtual void RunBeforeUnloadConfirm(content::RenderViewHost* rvh,
                                       const string16& message,
                                       bool is_reload,
@@ skipping 384 matching lines @@
 
   // Color chooser that was opened by this tab.
   content::ColorChooser* color_chooser_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 typedef class WebContentsImpl TabContents;
 
 #endif  // CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_