Implement WEBGL_shared_resources

Source/core/html/canvas/WebGLShareGroup.h

 /*
- * Copyright (C) 2008 Apple Inc. All Rights Reserved.
+ * Copyright (C) 2013 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 INC. ``AS IS'' AND ANY
+ * THIS SOFTWARE IS PROVIDED BY GOOGLE, INC. ``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 INC. OR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GOOGLE, INC. OR
  * 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. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef TextMetrics_h
-#define TextMetrics_h
+#ifndef WebGLShareGroup_h
+#define WebGLShareGroup_h
 
-#include "bindings/v8/ScriptWrappable.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
+#include "wtf/RefPtr.h"
 
 namespace WebCore {
 
-class TextMetrics : public RefCounted<TextMetrics>, public ScriptWrappable {
+class WebGLContextGroup;
+
+class WebGLShareGroup : public RefCounted<WebGLShareGroup> {
 public:
-    static PassRefPtr<TextMetrics> create() { return adoptRef(new TextMetrics); }
+    static PassRefPtr<WebGLShareGroup> create(PassRefPtr<WebGLContextGroup>);
 
-    float width() const { return m_width; }
-    void setWidth(float w) { m_width = w; }
+    virtual ~WebGLShareGroup();
+    PassRefPtr<WebGLContextGroup> contextGroup() const;
 
 private:
-    TextMetrics()
-        : m_width(0)
-    {
-        ScriptWrappable::init(this);
-    }
+    WebGLShareGroup(PassRefPtr<WebGLContextGroup>);
 
-    float m_width;
+    RefPtr<WebGLContextGroup> m_contextGroup;
 };
 
 } // namespace WebCore
 
-#endif // TextMetrics_h
+#endif // WebGLShareGroup_h