Moved the majority of WebGL functionality into WebGLRenderingContextBase

Source/core/html/canvas/OESElementIndexUint.h

Index: Source/core/html/canvas/OESElementIndexUint.h
diff --git a/Source/core/html/canvas/OESElementIndexUint.h b/Source/core/html/canvas/OESElementIndexUint.h
index c57f6b563c22af1c2190b40a7f361c19905601ff..0971d17217d5672cf2d7fbc3defa74e414a53a6a 100644
--- a/Source/core/html/canvas/OESElementIndexUint.h
+++ b/Source/core/html/canvas/OESElementIndexUint.h
@@ -34,15 +34,15 @@ namespace WebCore {
 
 class OESElementIndexUint : public WebGLExtension, public ScriptWrappable {
 public:
-    static PassRefPtr<OESElementIndexUint> create(WebGLRenderingContext*);
-    static bool supported(WebGLRenderingContext*);
+    static PassRefPtr<OESElementIndexUint> create(WebGLRenderingContextBase*);
+    static bool supported(WebGLRenderingContextBase*);
     static const char* getExtensionName();
 
     virtual ~OESElementIndexUint();
     virtual ExtensionName getName() const;
 
 private:
-    OESElementIndexUint(WebGLRenderingContext*);
+    OESElementIndexUint(WebGLRenderingContextBase*);
 };
 
 } // namespace WebCore