Remove <canvas>

sky/engine/core/html/canvas/WebGLSharedWebGraphicsContext3D.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_ENGINE_CORE_HTML_CANVAS_WEBGLSHAREDWEBGRAPHICSCONTEXT3D_H_
-#define SKY_ENGINE_CORE_HTML_CANVAS_WEBGLSHAREDWEBGRAPHICSCONTEXT3D_H_
-
-#include "sky/engine/wtf/Forward.h"
-#include "sky/engine/wtf/RefCounted.h"
-#include "sky/engine/wtf/RefPtr.h"
-
-namespace blink {
-
-class WebGraphicsContext3D;
-class DrawingBuffer;
-
-#if ENABLE(OILPAN)
-// The attached WebGLContextObjects are finalized using the
-// blink::WebGraphicsContext3D object of this object's DrawingBuffer.
-// Naturally the DrawingBuffer must then be kept alive until those
-// finalizers have run. With Oilpan, accomplish that by having the
-// WebGLContextObjects keep a RefPtr<> to an off-heap object that
-// safely handles the eventual release of the underlying
-// DrawingBuffer.
-class WebGLSharedWebGraphicsContext3D final : public RefCounted<WebGLSharedWebGraphicsContext3D> {
-public:
-    static PassRefPtr<WebGLSharedWebGraphicsContext3D> create(PassRefPtr<DrawingBuffer>);
-
-    ~WebGLSharedWebGraphicsContext3D();
-
-    // Disposing and updating the underlying DrawingBuffer;
-    // needed when handling loss and restoration of graphics contexts.
-    void dispose();
-    void update(PassRefPtr<DrawingBuffer>);
-
-    DrawingBuffer* drawingBuffer() const;
-
-    blink::WebGraphicsContext3D* webContext() const;
-private:
-    explicit WebGLSharedWebGraphicsContext3D(PassRefPtr<DrawingBuffer>);
-
-    RefPtr<DrawingBuffer> m_buffer;
-};
-#endif
-
-}
-
-#endif  // SKY_ENGINE_CORE_HTML_CANVAS_WEBGLSHAREDWEBGRAPHICSCONTEXT3D_H_