Implement WEBGL_shared_resources

Source/core/html/canvas/WebGLShareGroup.h

Index: Source/core/html/canvas/WebGLShareGroup.h
diff --git a/Source/core/html/canvas/EXTFragDepth.h b/Source/core/html/canvas/WebGLShareGroup.h
similarity index 73%
copy from Source/core/html/canvas/EXTFragDepth.h
copy to Source/core/html/canvas/WebGLShareGroup.h
index 57da19e2a91bd811c4231dacff183a0e3fcf2dae..8b284c5e2e58e66f39228ab33941cba92b9cf2d2 100644
--- a/Source/core/html/canvas/EXTFragDepth.h
+++ b/Source/core/html/canvas/WebGLShareGroup.h
@@ -23,28 +23,30 @@
  * 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