Adds NULL check in NotifySessionServiceOfRestoredTabs for

chrome/browser/sessions/session_restore.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_restore.h"
 
 #include <algorithm>
 #include <list>
 #include <set>
 #include <string>
@@ skipping 935 matching lines @@
       params.tabstrip_add_types = add_types;
       browser::Navigate(&params);
     }
   }
 
   // Invokes TabRestored on the SessionService for all tabs in browser after
   // initial_count.
   void NotifySessionServiceOfRestoredTabs(Browser* browser, int initial_count) {
     SessionService* session_service =
         SessionServiceFactory::GetForProfile(profile_);
+    if (!session_service)
+      return;
     for (int i = initial_count; i < browser->tab_count(); ++i)
       session_service->TabRestored(browser->GetTabContentsWrapperAt(i),
                                    browser->IsTabPinned(i));
   }
 
   // The profile to create the sessions for.
   Profile* profile_;
 
   // The first browser to restore to, may be null.
   Browser* browser_;
@@ skipping 93 matching lines @@
   if (active_session_restorers == NULL)
     return false;
   for (std::set<SessionRestoreImpl*>::const_iterator it =
            active_session_restorers->begin();
        it != active_session_restorers->end(); ++it) {
     if ((*it)->profile() == profile)
       return true;
   }
   return false;
 }