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

chrome/browser/ui/views/external_tab_container_win.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_UI_VIEWS_EXTERNAL_TAB_CONTAINER_WIN_H_
 #define CHROME_BROWSER_UI_VIEWS_EXTERNAL_TAB_CONTAINER_WIN_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 93 matching lines @@
   // is not an ExternalTabContainerWin.
   static ExternalTabContainer* GetExternalContainerFromNativeWindow(
       gfx::NativeView native_window);
 
   // Overridden from content::WebContentsDelegate:
   virtual content::WebContents* OpenURLFromTab(
       content::WebContents* source,
       const content::OpenURLParams& params) OVERRIDE;
   virtual void NavigationStateChanged(const content::WebContents* source,
                                       unsigned changed_flags) 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 void MoveContents(content::WebContents* source,
                             const gfx::Rect& pos) OVERRIDE;
   virtual bool IsPopupOrPanel(
       const content::WebContents* source) const OVERRIDE;
   virtual void UpdateTargetURL(content::WebContents* source, int32 page_id,
@@ skipping 271 matching lines @@
     return false;
   }
 
   virtual void BeforeUnloadFired(content::WebContents* tab, bool proceed,
                                  bool* proceed_to_fire_unload) {
     NOTREACHED();
   }
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_EXTERNAL_TAB_CONTAINER_WIN_H_