Merge the Sky Engine changes from the SkyDart branch

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

Index: sky/engine/core/html/canvas/WebGLRenderingContext.h
diff --git a/sky/engine/core/html/canvas/WebGLRenderingContext.h b/sky/engine/core/html/canvas/WebGLRenderingContext.h
index 89d6a8a612f2536f8d984c90eda08d087f3c98d1..da94ba86033f7c068c5bee419d7c649b3c3b0eb5 100644
--- a/sky/engine/core/html/canvas/WebGLRenderingContext.h
+++ b/sky/engine/core/html/canvas/WebGLRenderingContext.h
@@ -26,13 +26,12 @@
 #ifndef SKY_ENGINE_CORE_HTML_CANVAS_WEBGLRENDERINGCONTEXT_H_
 #define SKY_ENGINE_CORE_HTML_CANVAS_WEBGLRENDERINGCONTEXT_H_
 
-#include "sky/engine/bindings/core/v8/ScriptWrappable.h"
+#include "sky/engine/tonic/dart_wrappable.h"
 #include "sky/engine/core/html/canvas/WebGLRenderingContextBase.h"
 
 namespace blink {
 
-class WebGLRenderingContext final : public WebGLRenderingContextBase, public ScriptWrappable {
-    DEFINE_WRAPPERTYPEINFO();
+class WebGLRenderingContext final : public WebGLRenderingContextBase {
 public:
     static PassOwnPtr<WebGLRenderingContext> create(HTMLCanvasElement*, WebGLContextAttributes*);
     virtual ~WebGLRenderingContext();