Cleanup: Remove unneeded forward declarations from chrome/browser/chromeos.

chrome/browser/chromeos/login/screen_lock_view.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SCREEN_LOCK_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREEN_LOCK_VIEW_H_
 #pragma once
 
 #include "chrome/browser/chromeos/login/helper.h"
 #include "chrome/browser/chromeos/login/user_view.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "views/controls/textfield/textfield_controller.h"
 #include "views/view.h"
 
-namespace views {
-class ImageView;
-}  // namespace views
-
 namespace chromeos {
 
 class ScreenLocker;
 class UserView;
 
 namespace test {
 class ScreenLockerTester;
 }  // namespace test
 
 // ScreenLockView creates view components necessary to authenticate
@@ skipping 55 matching lines @@
 
   // Username that overlays on top of user's picture.
   views::View* username_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenLockView);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREEN_LOCK_VIEW_H_