ui: Cleanup class/struct forward declarations

ui/android/resources/crushed_sprite_resource.h

 // Copyright 2015 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 UI_ANDROID_RESOURCES_CRUSHED_SPRITE_RESOURCE_H_
 #define UI_ANDROID_RESOURCES_CRUSHED_SPRITE_RESOURCE_H_
 
 #include <memory>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/android/ui_android_export.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace cc {
-class LayerTreeHost;
 typedef int UIResourceId;
 }
 
-namespace gfx {
-class JavaBitmap;
-}
-
 namespace ui {
 
 // A resource that provides an unscaled bitmap and corresponding metadata for a
 // crushed sprite. A crushed sprite animation is run by drawing rectangles from
 // a bitmap to a canvas. Each frame in the animation draws its rectangles on top
 // of the previous frame.
 class UI_ANDROID_EXPORT CrushedSpriteResource {
  public:
   typedef std::vector<std::pair<gfx::Rect, gfx::Rect>> FrameSrcDstRects;
   typedef std::vector<FrameSrcDstRects> SrcDstRects;
@@ skipping 42 matching lines @@
   SrcDstRects src_dst_rects_;
   gfx::Size unscaled_sprite_size_;
   gfx::Size scaled_sprite_size_;
 
   DISALLOW_COPY_AND_ASSIGN(CrushedSpriteResource);
 };
 
 }  // namespace ui
 
 #endif  // UI_ANDROID_RESOURCES_CRUSHED_SPRITE_RESOURCE_H_