WebGL support.

Source/WebCore/bindings/dart/custom/DartHTMLCanvasElementCustom.cpp

Index: Source/WebCore/bindings/dart/custom/DartHTMLCanvasElementCustom.cpp
diff --git a/Source/WebCore/bindings/dart/custom/DartHTMLCanvasElementCustom.cpp b/Source/WebCore/bindings/dart/custom/DartHTMLCanvasElementCustom.cpp
index b66992010fe7c6ffe950396f28a94f84c7204081..7752d07441b40a5c10913e69751dcae8790dddfc 100644
--- a/Source/WebCore/bindings/dart/custom/DartHTMLCanvasElementCustom.cpp
+++ b/Source/WebCore/bindings/dart/custom/DartHTMLCanvasElementCustom.cpp
@@ -30,6 +30,7 @@
 #include "config.h"
 #include "DartHTMLCanvasElement.h"
 
+#include "CanvasContextAttributes.h"
 #include "CanvasRenderingContext.h"
 #include "CanvasRenderingContext2D.h"
 #include "DartDOMWrapper.h"
@@ -40,10 +41,10 @@
 #include "HTMLCanvasElement.h"
 #if ENABLE(WEBGL)
 #include "DartUtilities.h"
+#include "WebGLContextAttributes.h"
 #include "WebGLRenderingContext.h"
 #endif
 
-
 namespace WebCore {
 
 namespace DartHTMLCanvasElementInternal {
@@ -90,8 +91,17 @@ void getContextCallback(Dart_NativeArguments args)
             goto fail;
         }
 
-        // FIXME: implement support for CanvasContextAttributes.
-        CanvasRenderingContext* result = receiver->getContext(contextId, 0);
+        RefPtr<CanvasContextAttributes> attrs;
+#if ENABLE(WEBGL)
+        const String& contextIdStr = contextId;
+        if (contextIdStr == "experimental-webgl" || contextIdStr == "webkit-3d") {
+            attrs = WebGLContextAttributes::create();
+            // FIXME: IDL doesn't mention second argument, but JS
+            // passes map with parameters describing desired context
+            // features.
+        }
+#endif
+        CanvasRenderingContext* result = receiver->getContext(contextId, attrs.get());
         if (!result)
             return;
         if (result->is2d())