Add BackgroundModeOptimizer that can restart the browser

chrome/browser/ui/tab_contents/tab_contents_iterator_unittest.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/ui/tab_contents/tab_contents_iterator.h"
 
 #include <stddef.h>
 
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 177 matching lines @@
 
   message_center::MessageCenter::Initialize();
   TestingBrowserProcess* testing_browser_process =
       TestingBrowserProcess::GetGlobal();
   testing_browser_process->SetLocalState(&testing_pref_service);
   ASSERT_TRUE(g_browser_process->local_state());
   ProfileManager* profile_manager = new ProfileManager(base::FilePath());
   testing_browser_process->SetProfileManager(profile_manager);
 
   chrome::AttemptRestart();
+  EXPECT_TRUE(testing_pref_service.GetBoolean(prefs::kWasRestarted));
+
   // Cancel the effects of us calling chrome::AttemptRestart. Otherwise tests
   // ran after this one will fail.
   browser_shutdown::SetTryingToQuit(false);
 
-  EXPECT_TRUE(testing_pref_service.GetBoolean(prefs::kWasRestarted));
   testing_browser_process->SetLocalState(NULL);
 }