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

chrome/browser/tab_contents/background_contents.h

 // Copyright (c) 2011 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_TAB_CONTENTS_BACKGROUND_CONTENTS_H_
 #define CHROME_BROWSER_TAB_CONTENTS_BACKGROUND_CONTENTS_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 12 matching lines @@
 // This class consumes WebContents. It can host a renderer, but does not
 // have any visible display.
 class BackgroundContents : public content::WebContentsDelegate,
                            public content::WebContentsObserver,
                            public content::NotificationObserver {
  public:
   class Delegate {
    public:
     // Called by AddNewContents(). Asks the delegate to attach the opened
     // WebContents to a suitable container (e.g. browser) or to show it if it's
-    // a popup window.
-    virtual void AddWebContents(content::WebContents* new_contents,
+    // a popup window. Returns false if the popup was blocked.
+    virtual bool AddWebContents(content::WebContents* new_contents,
                                 WindowOpenDisposition disposition,
                                 const gfx::Rect& initial_pos,
                                 bool user_gesture) = 0;
 
    protected:
     virtual ~Delegate() {}
   };
 
   BackgroundContents(content::SiteInstance* site_instance,
                      int routing_id,
                      Delegate* delegate);
   virtual ~BackgroundContents();
 
   content::WebContents* web_contents() const { return web_contents_.get(); }
   virtual const GURL& GetURL() const;
 
   // content::WebContentsDelegate implementation:
   virtual void CloseContents(content::WebContents* source) OVERRIDE;
   virtual bool ShouldSuppressDialogs() OVERRIDE;
   virtual void DidNavigateMainFramePostCommit(
       content::WebContents* tab) 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 RenderViewGone(base::TerminationStatus status) OVERRIDE;
 
   // content::NotificationObserver
   virtual void Observe(int type,
@@ skipping 21 matching lines @@
   BackgroundContents* contents;
 
   // The name of the parent frame for these contents.
   const string16& frame_name;
 
   // The ID of the parent application (if any).
   const string16& application_id;
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_BACKGROUND_CONTENTS_H_