Switch NOTIFICATION_TAB_PARENTED to use WebContents.

chrome/browser/extensions/extension_tab_id_map.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_tab_id_map.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/browser/tab_contents/retargeting_details.h"
@@ skipping 68 matching lines @@
           BrowserThread::IO, FROM_HERE,
           base::Bind(
               &ExtensionTabIdMap::SetTabAndWindowId,
               base::Unretained(ExtensionTabIdMap::GetInstance()),
               host->GetProcess()->GetID(), host->GetRoutingID(),
               session_tab_helper->session_id().id(),
               session_tab_helper->window_id().id()));
       break;
     }
     case chrome::NOTIFICATION_TAB_PARENTED: {
-      TabContents* tab = content::Source<TabContents>(source).ptr();
-      WebContents* web_contents = tab->web_contents();
+      WebContents* web_contents = content::Source<WebContents>(source).ptr();
       SessionTabHelper* session_tab_helper =
           SessionTabHelper::FromWebContents(web_contents);
       if (!session_tab_helper)
         return;
       RenderViewHost* host = web_contents->GetRenderViewHost();
       BrowserThread::PostTask(
           BrowserThread::IO, FROM_HERE,
           base::Bind(
               &ExtensionTabIdMap::SetTabAndWindowId,
               base::Unretained(ExtensionTabIdMap::GetInstance()),
@@ skipping 79 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   RenderId render_id(render_process_host_id, routing_id);
   TabAndWindowIdMap::iterator iter = map_.find(render_id);
   if (iter != map_.end()) {
     *tab_id = iter->second.first;
     *window_id = iter->second.second;
     return true;
   }
   return false;
 }