Pass result of blockage across content API when new tab blocked.

chrome/browser/debugger/devtools_window.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 CHROME_BROWSER_DEBUGGER_DEVTOOLS_WINDOW_H_
 #define CHROME_BROWSER_DEBUGGER_DEVTOOLS_WINDOW_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 90 matching lines @@
   static GURL GetDevToolsUrl(Profile* profile, bool docked,
                              bool shared_worker_frontend);
   void UpdateTheme();
   void AddDevToolsExtensionsToClient();
   void CallClientFunction(const std::string& function_name,
                           const base::Value* arg);
   // Overridden from content::WebContentsDelegate.
   virtual content::WebContents* OpenURLFromTab(
       content::WebContents* source,
       const content::OpenURLParams& params) OVERRIDE;
-  virtual void AddNewContents(content::WebContents* source,
+  virtual bool AddNewContents(content::WebContents* source,
                               content::WebContents* new_contents,
                               WindowOpenDisposition disposition,
                               const gfx::Rect& initial_pos,
                               bool user_gesture) OVERRIDE;
   virtual void CloseContents(content::WebContents* source) OVERRIDE {}
   virtual bool PreHandleKeyboardEvent(
       content::WebContents* source,
       const content::NativeWebKeyboardEvent& event,
       bool* is_keyboard_shortcut) OVERRIDE;
   virtual void HandleKeyboardEvent(
@@ skipping 42 matching lines @@
   bool docked_;
   bool is_loaded_;
   DevToolsToggleAction action_on_load_;
   content::NotificationRegistrar registrar_;
   content::DevToolsClientHost* frontend_host_;
   scoped_ptr<DevToolsFileHelper> file_helper_;
   DISALLOW_COPY_AND_ASSIGN(DevToolsWindow);
 };
 
 #endif  // CHROME_BROWSER_DEBUGGER_DEVTOOLS_WINDOW_H_