Don't activate a window if screen is locked.

chrome/browser/chromeos/login/existing_user_controller_browsertest.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 "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "chrome/browser/chromeos/cros/cros_mock.h"
 #include "chrome/browser/chromeos/cros/cros_in_process_browser_test.h"
 #include "chrome/browser/chromeos/cros/mock_cryptohome_library.h"
@@ skipping 46 matching lines @@
 
 class MockLoginDisplayHost : public LoginDisplayHost {
  public:
   MockLoginDisplayHost() {
   }
 
   MOCK_METHOD1(CreateLoginDisplay, LoginDisplay*(LoginDisplay::Delegate*));
   MOCK_CONST_METHOD0(GetNativeWindow, gfx::NativeWindow(void));
   MOCK_CONST_METHOD0(GetWidget, views::Widget*(void));
   MOCK_METHOD0(OnSessionStart, void(void));
+  MOCK_METHOD0(PreSessionStart, void(void));
   MOCK_METHOD1(SetOobeProgressBarVisible, void(bool));
   MOCK_METHOD1(SetShutdownButtonEnabled, void(bool));
   MOCK_METHOD1(SetStatusAreaEnabled, void(bool));
   MOCK_METHOD1(SetStatusAreaVisible, void(bool));
   MOCK_METHOD0(ShowBackground, void(void));
   MOCK_METHOD0(CheckForAutoEnrollment, void(void));
   MOCK_METHOD2(StartWizard, void(const std::string&, DictionaryValue*));
   MOCK_METHOD0(StartSignInScreen, void(void));
   MOCK_METHOD0(ResumeSignInScreen, void(void));
 
@@ skipping 124 matching lines @@
               StartWizard(WizardController::kEnterpriseEnrollmentScreenName, _))
       .Times(0);
   EXPECT_CALL(*mock_login_display_host_,
               StartWizard(WizardController::kUserImageScreenName, _))
       .Times(1);
   EXPECT_CALL(*mock_cryptohome_library_, AsyncSetOwnerUser(_, _)).Times(1);
   existing_user_controller()->CompleteLogin(kUsername, kPassword);
 }
 
 }  // namespace chromeos