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

chrome/browser/notifications/balloon_host.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_NOTIFICATIONS_BALLOON_HOST_H_
 #define CHROME_BROWSER_NOTIFICATIONS_BALLOON_HOST_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 45 matching lines @@
   virtual ~BalloonHost();
 
   scoped_ptr<content::WebContents> web_contents_;
 
  private:
   // content::WebContentsDelegate implementation:
   virtual void CloseContents(content::WebContents* source) OVERRIDE;
   virtual void HandleMouseDown() OVERRIDE;
   virtual void ResizeDueToAutoResize(content::WebContents* source,
                                      const gfx::Size& pref_size) 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;
 
   // content::WebContentsObserver implementation:
   virtual void RenderViewCreated(
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void RenderViewReady() OVERRIDE;
   virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
@@ skipping 20 matching lines @@
   // Site instance for the balloon/profile, to be used for opening new links.
   scoped_refptr<content::SiteInstance> site_instance_;
 
   // A flag to enable Web UI.
   bool enable_web_ui_;
 
   ExtensionFunctionDispatcher extension_function_dispatcher_;
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_BALLOON_HOST_H_