Implement WEBGL_shared_resources

Source/core/html/canvas/WebGLShareGroup.h

 /*
  * 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 AND ITS CONTRIBUTORS "AS IS" AND ANY

[Ken Russell (switch to Gerrit), 2013/06/19 03:51:24]

This file and some of the others should use a newer copyright header.

  * 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 EXTFragDepth_h
-#define EXTFragDepth_h
+#ifndef WebGLShareGroup_h
+#define WebGLShareGroup_h
 
-#include "bindings/v8/ScriptWrappable.h"
-#include "core/html/canvas/WebGLExtension.h"
 #include "wtf/PassRefPtr.h"
+#include "wtf/RefCounted.h"
+#include "wtf/RefPtr.h"
 
 namespace WebCore {
 
-class EXTFragDepth : public WebGLExtension, public ScriptWrappable {
+class WebGLContextGroup;
+
+class WebGLShareGroup : public RefCounted<WebGLShareGroup> {
 public:
-    static PassRefPtr<EXTFragDepth> create(WebGLRenderingContext*);
-    static bool supported(WebGLRenderingContext*);
-    static const char* getExtensionName();
+    static PassRefPtr<WebGLShareGroup> create(PassRefPtr<WebGLContextGroup>);
 
-    virtual ~EXTFragDepth();
-    virtual ExtensionName getName() const;
+    virtual ~WebGLShareGroup();
+    PassRefPtr<WebGLContextGroup> contextGroup() const;
 
 private:
-    explicit EXTFragDepth(WebGLRenderingContext*);
+    WebGLShareGroup(PassRefPtr<WebGLContextGroup>);
+
+    RefPtr<WebGLContextGroup> m_contextGroup;
 };
 
 } // namespace WebCore
 
-#endif // EXTFragDepth_h
+#endif // WebGLShareGroup_h