Fixes for handling of MockDBusThreadManager::GetSystemBus().

chrome/browser/chromeos/login/screen_locker_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/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "chrome/browser/chromeos/cros/cros_in_process_browser_test.h"
 #include "chrome/browser/chromeos/cros/mock_network_library.h"
 #include "chrome/browser/chromeos/login/mock_authenticator.h"
@@ skipping 87 matching lines @@
         content::NotificationService::AllSources());
     if (!tester->IsLocked())
       lock_state_observer.Wait();
     EXPECT_TRUE(tester->IsLocked());
   }
 
  private:
   virtual void SetUpInProcessBrowserTestFixture() {
     MockDBusThreadManager* mock_dbus_thread_manager =
         new MockDBusThreadManager;
+    EXPECT_CALL(*mock_dbus_thread_manager, GetSystemBus())
+        .WillRepeatedly(Return(reinterpret_cast<dbus::Bus*>(NULL)));
     DBusThreadManager::InitializeForTesting(mock_dbus_thread_manager);
     CrosInProcessBrowserTest::SetUpInProcessBrowserTestFixture();
     mock_power_manager_client_ = static_cast<MockPowerManagerClient*>(
         DBusThreadManager::Get()->GetPowerManagerClient());
     cros_mock_->InitStatusAreaMocks();
     EXPECT_CALL(*mock_power_manager_client_, AddObserver(testing::_))
         .Times(1)
         .RetiresOnSaturation();
     EXPECT_CALL(*mock_power_manager_client_, NotifyScreenUnlockCompleted())
         .Times(1)
@@ skipping 127 matching lines @@
   content::RunAllPendingInMessageLoop();
   EXPECT_EQ("", tester->GetPassword());
 
   // Close the locker to match expectations.
   ScreenLocker::Hide();
   content::RunAllPendingInMessageLoop();
   EXPECT_FALSE(tester->IsLocked());
 }
 
 }  // namespace chromeos