Switch NOTIFICATION_TAB_PARENTED to use WebContents.

chrome/browser/sessions/session_service.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/sessions/session_service.h"
 
 #include <algorithm>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 586 matching lines @@
           !should_track_changes_for_browser_type(browser->type(), app_type))
         return;
 
       RestoreIfNecessary(std::vector<GURL>(), browser);
       SetWindowType(browser->session_id(), browser->type(), app_type);
       SetWindowAppName(browser->session_id(), browser->app_name());
       break;
     }
 
     case chrome::NOTIFICATION_TAB_PARENTED: {
-      TabContents* tab = content::Source<TabContents>(source).ptr();
-      if (tab->profile() != profile())
+      WebContents* web_contents = content::Source<WebContents>(source).ptr();
+      if (web_contents->GetBrowserContext() != profile())
         return;
-      WebContents* web_contents = tab->web_contents();
       SessionTabHelper* session_tab_helper =
           SessionTabHelper::FromWebContents(web_contents);
       SetTabWindow(session_tab_helper->window_id(),
                    session_tab_helper->session_id());
       extensions::TabHelper* extensions_tab_helper =
           extensions::TabHelper::FromWebContents(web_contents);
       if (extensions_tab_helper &&
           extensions_tab_helper->extension_app()) {
         SetTabExtensionAppID(
             session_tab_helper->window_id(),
@@ skipping 1126 matching lines @@
       50);
   if (use_long_period) {
     std::string long_name_("SessionRestore.SaveLongPeriod");
     UMA_HISTOGRAM_CUSTOM_TIMES(long_name_,
         delta,
         save_delay_in_mins_,
         save_delay_in_hrs_,
         50);
   }
 }