chromeos: Explicitly initialize and shut down UpgradeDetectorChromeos.

chrome/browser/chromeos/login/update_screen_browsertest.cc

 // 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.
 
 #include "base/message_loop.h"
 #include "chrome/browser/chromeos/cros/mock_network_library.h"
 #include "chrome/browser/chromeos/cros/mock_update_library.h"
 #include "chrome/browser/chromeos/dbus/mock_dbus_thread_manager.h"
 #include "chrome/browser/chromeos/dbus/mock_session_manager_client.h"
 #include "chrome/browser/chromeos/login/mock_screen_observer.h"
@@ skipping 35 matching lines @@
     EXPECT_CALL(*mock_session_manager_client, EmitLoginPromptReady())
         .Times(1);
 
     mock_update_library_ = new MockUpdateLibrary();
     cros_mock_->test_api()->SetUpdateLibrary(mock_update_library_, true);
 
     // UpdateScreen::StartUpdate() will be called by the WizardController
     // just after creating the update screen, so the expectations for that
     // should be set up here.
     EXPECT_CALL(*mock_update_library_, AddObserver(_))
-        .Times(1);
+        .Times(AtLeast(1));
     EXPECT_CALL(*mock_update_library_, RemoveObserver(_))
         .Times(AtLeast(1));
     EXPECT_CALL(*mock_update_library_, RequestUpdateCheck(_,_))
         .Times(1)
         .WillOnce(Invoke(RequestUpdateCheckSuccess));
 
     mock_network_library_ = cros_mock_->mock_network_library();
     EXPECT_CALL(*mock_network_library_, Connected())
         .Times(1)  // also called by NetworkMenu::InitMenuItems()
         .WillRepeatedly((Return(false)))
@@ skipping 142 matching lines @@
   EXPECT_CALL(*mock_update_library_, status())
       .Times(AtLeast(1))
       .WillRepeatedly(ReturnRef(status));
   EXPECT_CALL(*mock_screen_observer_,
               OnExit(ScreenObserver::UPDATE_ERROR_UPDATING))
       .Times(1);
   update_screen_->UpdateStatusChanged(status);
 }
 
 }  // namespace chromeos