IDL: Generate union type containers

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index 3d9b2ff48daa51b26d54f977f31b9b48e03af427..d9973c2d86cf2b4bc9b8693edb4855524db8a4b0 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -34,6 +34,7 @@
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "bindings/core/v8/ScriptController.h"
+#include "bindings/core/v8/UnionTypesCore.h"
 #include "bindings/core/v8/V8DOMWrapper.h"
 #include "bindings/core/v8/WindowProxy.h"
 #include "core/HTMLElementFactory.h"
@@ -4941,7 +4942,7 @@ void Document::detachRange(Range* range)
     m_ranges.remove(range);
 }
 
-void Document::getCSSCanvasContext(const String& type, const String& name, int width, int height, RefPtrWillBeRawPtr<CanvasRenderingContext2D>& context2d, RefPtrWillBeRawPtr<WebGLRenderingContext>& context3d)
+void Document::getCSSCanvasContext(const String& type, const String& name, int width, int height, CanvasRenderingContext2DOrWebGLRenderingContext& returnValue)
 {
     HTMLCanvasElement& element = getCSSCanvasElement(name);
     element.setSize(IntSize(width, height));
@@ -4950,9 +4951,9 @@ void Document::getCSSCanvasContext(const String& type, const String& name, int w
         return;
 
     if (context->is2d()) {
-        context2d = toCanvasRenderingContext2D(context);
+        returnValue.setCanvasRenderingContext2D(toCanvasRenderingContext2D(context));
     } else if (context->is3d()) {
-        context3d = toWebGLRenderingContext(context);
+        returnValue.setWebGLRenderingContext(toWebGLRenderingContext(context));
     }
 }