Move MockUpdateEngineClient::GetLastStatus() expectation to MockDBusThreadManager's ctor

chrome/browser/chromeos/login/update_screen_browsertest.cc

Index: chrome/browser/chromeos/login/update_screen_browsertest.cc
diff --git a/chrome/browser/chromeos/login/update_screen_browsertest.cc b/chrome/browser/chromeos/login/update_screen_browsertest.cc
index b7c7c155eda6e2a104367ee62e9def2d7d4188f5..12d8b6c8356142c4d93a1b09b7d01fbb030ac1e4 100644
--- a/chrome/browser/chromeos/login/update_screen_browsertest.cc
+++ b/chrome/browser/chromeos/login/update_screen_browsertest.cc
@@ -56,12 +56,6 @@ class UpdateScreenTest : public WizardInProcessBrowserTest {
     mock_update_engine_client_
         = mock_dbus_thread_manager->mock_update_engine_client();
 
-    // ChromeBrowserMainPartsChromeos::PostProfileInit() creates an
-    // AutomaticRebootManager which calls the following function.
-    EXPECT_CALL(*mock_update_engine_client_, GetLastStatus())
-        .Times(1)
-        .WillRepeatedly(Return(MockUpdateEngineClient::Status()));
-
     // UpdateScreen::StartUpdate() will be called by the WizardController
     // just after creating the update screen, so the expectations for that
     // should be set up here.