Remove <canvas>

sky/engine/core/html/canvas/WebGLCompressedTextureETC1.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_WEBGLCOMPRESSEDTEXTUREETC1_H_
-#define SKY_ENGINE_CORE_HTML_CANVAS_WEBGLCOMPRESSEDTEXTUREETC1_H_
-
-#include "sky/engine/tonic/dart_wrappable.h"
-#include "sky/engine/core/html/canvas/WebGLExtension.h"
-#include "sky/engine/wtf/PassRefPtr.h"
-
-namespace blink {
-
-class WebGLTexture;
-
-class WebGLCompressedTextureETC1 final : public WebGLExtension, public DartWrappable {
-    DEFINE_WRAPPERTYPEINFO();
-public:
-    static PassRefPtr<WebGLCompressedTextureETC1> create(WebGLRenderingContextBase*);
-    static bool supported(WebGLRenderingContextBase*);
-    static const char* extensionName();
-
-    virtual ~WebGLCompressedTextureETC1();
-    virtual WebGLExtensionName name() const override;
-
-private:
-    explicit WebGLCompressedTextureETC1(WebGLRenderingContextBase*);
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_HTML_CANVAS_WEBGLCOMPRESSEDTEXTUREETC1_H_