Make browser_handles_top_level_requests synchronous.

content/public/browser/render_view_host_delegate.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_PUBLIC_BROWSER_RENDER_VIEW_HOST_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_VIEW_HOST_DELEGATE_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/i18n/rtl.h"
 #include "base/process_util.h"
 #include "base/string16.h"
 #include "content/common/content_export.h"
+#include "content/public/common/page_transition_types.h"
 #include "content/public/common/view_type.h"
 #include "ipc/ipc_channel.h"
 #include "net/base/load_states.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPopupType.h"
 #include "ui/base/javascript_message_type.h"
 #include "webkit/glue/window_open_disposition.h"
 
 class GURL;
 class SkBitmap;
@@ skipping 263 matching lines @@
                               int64 source_frame_id) {}
 
   // The page wants to transfer the request to a new renderer.
   virtual void RequestTransferURL(
       const GURL& url,
       const content::Referrer& referrer,
       WindowOpenDisposition disposition,
       int64 source_frame_id,
       const content::GlobalRequestID& old_request_id) {}
 
+  // The page is asking the browser to decide if the navigation should be
+  // ignored (only happens if the appropriate renderer pref is set).
+  virtual bool ShouldIgnoreNavigation(const GURL& url,
+                              const content::Referrer& referrer,
+                              WindowOpenDisposition disposition,
+                              int64 source_frame_id,
+                              bool is_content_initiated);
+
   // A javascript message, confirmation or prompt should be shown.
   virtual void RunJavaScriptMessage(RenderViewHost* rvh,
                                     const string16& message,
                                     const string16& default_prompt,
                                     const GURL& frame_url,
                                     ui::JavascriptMessageType type,
                                     IPC::Message* reply_msg,
                                     bool* did_suppress_message) {}
 
   virtual void RunBeforeUnloadConfirm(RenderViewHost* rvh,
@@ skipping 97 matching lines @@
   // Notification that the view has lost the mouse lock.
   virtual void LostMouseLock() {}
 
  protected:
   virtual ~RenderViewHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_VIEW_HOST_DELEGATE_H_