Break Sky's dependency on cc

sky/viewer/cc/web_external_texture_layer_impl.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_VIEWER_CC_WEB_EXTERNAL_TEXTURE_LAYER_IMPL_H_
-#define SKY_VIEWER_CC_WEB_EXTERNAL_TEXTURE_LAYER_IMPL_H_
-
-#include "base/bind.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/scoped_vector.h"
-#include "sky/viewer/cc/sky_viewer_cc_export.h"
-#include "cc/layers/texture_layer_client.h"
-#include "sky/engine/public/platform/WebExternalTextureLayer.h"
-
-namespace blink {
-struct WebFloatRect;
-struct WebExternalTextureMailbox;
-}
-
-namespace cc {
-class SingleReleaseCallback;
-class TextureMailbox;
-}
-
-namespace sky_viewer_cc {
-
-class WebLayerImpl;
-class WebExternalBitmapImpl;
-
-class WebExternalTextureLayerImpl
-    : public blink::WebExternalTextureLayer,
-      public cc::TextureLayerClient,
-      public base::SupportsWeakPtr<WebExternalTextureLayerImpl> {
- public:
-  SKY_VIEWER_CC_EXPORT explicit WebExternalTextureLayerImpl(
-      blink::WebExternalTextureLayerClient*);
-  virtual ~WebExternalTextureLayerImpl();
-
-  // blink::WebExternalTextureLayer implementation.
-  virtual blink::WebLayer* layer();
-  virtual void clearTexture();
-  virtual void setOpaque(bool opaque);
-  virtual void setPremultipliedAlpha(bool premultiplied);
-  virtual void setBlendBackgroundColor(bool blend);
-  virtual void setRateLimitContext(bool rate_limit);
-
-  // TextureLayerClient implementation.
-  virtual bool PrepareTextureMailbox(
-      cc::TextureMailbox* mailbox,
-      scoped_ptr<cc::SingleReleaseCallback>* release_callback,
-      bool use_shared_memory) override;
-
- private:
-  static void DidReleaseMailbox(
-      base::WeakPtr<WebExternalTextureLayerImpl> layer,
-      const blink::WebExternalTextureMailbox& mailbox,
-      WebExternalBitmapImpl* bitmap,
-      unsigned sync_point,
-      bool lost_resource);
-
-  WebExternalBitmapImpl* AllocateBitmap();
-
-  blink::WebExternalTextureLayerClient* client_;
-  scoped_ptr<WebLayerImpl> layer_;
-  ScopedVector<WebExternalBitmapImpl> free_bitmaps_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebExternalTextureLayerImpl);
-};
-
-}  // namespace sky_viewer_cc
-
-#endif  // SKY_VIEWER_CC_WEB_EXTERNAL_TEXTURE_LAYER_IMPL_H_