Cleanup: Remove unneeded forward declarations in views.

views/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 VIEWS_VIEW_H_
 #define VIEWS_VIEW_H_
 #pragma once
 
 #include <algorithm>
 #include <map>
@@ skipping 24 matching lines @@
 namespace gfx {
 class Canvas;
 class Insets;
 class Path;
 }
 
 namespace ui {
 struct AccessibleViewState;
 class Compositor;
 class Layer;
-class LayerAnimationSequence;
 class TextInputClient;
 class Texture;
 class ThemeProvider;
 class Transform;
 enum TouchStatus;
 }
 
 #if defined(OS_WIN)
 class __declspec(uuid("26f5641a-246d-457b-a96d-07f3fae6acf2"))
 NativeViewAccessibilityWin;
@@ skipping 1389 matching lines @@
   base::win::ScopedComPtr<NativeViewAccessibilityWin>
       native_view_accessibility_win_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_VIEW_H_