Remove <canvas>

sky/engine/core/html/canvas/WebGLExtension.h

-/*
- * Copyright (C) 2010 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- * 2.  Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef SKY_ENGINE_CORE_HTML_CANVAS_WEBGLEXTENSION_H_
-#define SKY_ENGINE_CORE_HTML_CANVAS_WEBGLEXTENSION_H_
-
-#include "sky/engine/core/html/canvas/WebGLExtensionName.h"
-#include "sky/engine/core/html/canvas/WebGLRenderingContextBase.h"
-#include "sky/engine/platform/heap/Handle.h"
-#include "sky/engine/wtf/RefCounted.h"
-
-namespace blink {
-
-class WebGLExtension : public RefCounted<WebGLExtension> {
-    WTF_MAKE_FAST_ALLOCATED;
-public:
-    WebGLRenderingContextBase* context() { return m_context; }
-
-    virtual ~WebGLExtension();
-    virtual WebGLExtensionName name() const = 0;
-
-    // Lose this extension. Passing true = force loss. Some extensions
-    // like WEBGL_lose_context are not normally lost when the context
-    // is lost but must be lost when destroying their WebGLRenderingContextBase.
-    virtual void lose(bool)
-    {
-        m_context = nullptr;
-    }
-
-    bool isLost()
-    {
-        return !m_context;
-    }
-
-protected:
-    explicit WebGLExtension(WebGLRenderingContextBase*);
-
-    RawPtr<WebGLRenderingContextBase> m_context;
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_HTML_CANVAS_WEBGLEXTENSION_H_