Remove all uses of skia::RefPtr and stale includes

cc/trees/layer_tree_host_impl.h

 // Copyright 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 CC_TREES_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 23 matching lines @@
 #include "cc/resources/ui_resource_client.h"
 #include "cc/scheduler/begin_frame_tracker.h"
 #include "cc/scheduler/commit_earlyout_reason.h"
 #include "cc/scheduler/draw_result.h"
 #include "cc/scheduler/video_frame_controller.h"
 #include "cc/tiles/image_decode_controller.h"
 #include "cc/tiles/tile_manager.h"
 #include "cc/trees/layer_tree_settings.h"
 #include "cc/trees/mutator_host_client.h"
 #include "cc/trees/task_runner_provider.h"
-#include "skia/ext/refptr.h"
-#include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace gfx {
 class ScrollOffset;
 }
 
 namespace cc {
 
 class AnimationEvents;
 class AnimationHost;
@@ skipping 787 matching lines @@
   std::unique_ptr<Viewport> viewport_;
 
   LayerTreeMutator* mutator_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_