Move //sky/compositor to //sky/viewer/compositor

sky/compositor/layer_host_client.h

-// Copyright 2014 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 SKY_COMPOSITOR_LAYER_HOST_CLIENT_H_
-#define SKY_COMPOSITOR_LAYER_HOST_CLIENT_H_
-
-#include "base/time/time.h"
-#include "mojo/services/surfaces/public/interfaces/surface_id.mojom.h"
-
-namespace mojo {
-class Shell;
-}
-
-namespace sky {
-
-class LayerHostClient {
- public:
-  virtual mojo::Shell* GetShell() = 0;
-  virtual void BeginFrame(base::TimeTicks frame_time) = 0;
-  virtual void OnSurfaceIdAvailable(mojo::SurfaceIdPtr surface_id) = 0;
-
- protected:
-  virtual ~LayerHostClient();
-};
-
-}  // namespace sky
-
-#endif  // SKY_COMPOSITOR_LAYER_HOST_CLIENT_H_