Remove the most obvious dead code from message center.

chrome/browser/notifications/message_center_notifications_unittest_win.cc

 // Copyright 2013 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/memory/scoped_ptr.h"
 #include "base/prefs/testing_pref_service.h"
 #include "base/run_loop.h"
 #include "base/test/test_timeouts.h"
 #include "base/values.h"
 #include "chrome/browser/notifications/message_center_notification_manager.h"
@@ skipping 20 matching lines @@
         displayed_first_run_balloon_(false) {}
 
   virtual void DisplayFirstRunBalloon() OVERRIDE {
     displayed_first_run_balloon_ = true;
     base::MessageLoop::current()->PostTask(FROM_HERE, quit_closure_);
   }
 
   virtual void OnMessageCenterTrayChanged() OVERRIDE {}
   virtual bool ShowPopups() OVERRIDE { return true; }
   virtual void HidePopups() OVERRIDE {}
-  virtual void UpdatePopups() OVERRIDE {}
   virtual bool ShowMessageCenter() OVERRIDE { return true; }
   virtual bool ShowNotifierSettings() OVERRIDE { return true; }
   virtual void HideMessageCenter() OVERRIDE {}
 
   bool displayed_first_run_balloon() const {
     return displayed_first_run_balloon_;
   }
  private:
   MessageCenterTray tray_;
   base::Closure quit_closure_;
@@ skipping 98 matching lines @@
 TEST_F(MessageCenterNotificationManagerTest,
        FirstRunNotShownWithMessageCenter) {
   TestingProfile profile;
   notification_manager()->Add(GetANotification("test"), &profile);
   message_center()->SetMessageCenterVisible(true);
   run_loop()->RunUntilIdle();
   EXPECT_FALSE(notification_manager()->FirstRunTimerIsActive());
   EXPECT_FALSE(DidFirstRunPref());
 }
 }  // namespace message_center