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 1ba1c37be97857a0af5a58294172928398765e58..7f796f7a077402c5117058ee62aa18834688d41c 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"
@@ -4934,7 +4935,7 @@ 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));
@@ -4943,9 +4944,9 @@ 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));
     }
 }