Oilpan: move WorkerGlobalScope to oilpan's heap.

Source/modules/imagebitmap/ImageBitmapFactories.cpp

Index: Source/modules/imagebitmap/ImageBitmapFactories.cpp
diff --git a/Source/modules/imagebitmap/ImageBitmapFactories.cpp b/Source/modules/imagebitmap/ImageBitmapFactories.cpp
index eae94095b4a11d2a4ac9e33c00446941b17c99ac..5152a56a88726730ef1aa2ba7da08f5ef4b55b10 100644
--- a/Source/modules/imagebitmap/ImageBitmapFactories.cpp
+++ b/Source/modules/imagebitmap/ImageBitmapFactories.cpp
@@ -273,7 +273,19 @@ ImageBitmapFactories& ImageBitmapFactories::from(EventTarget& eventTarget)
     return fromInternal(*toWorkerGlobalScope(eventTarget.executionContext()));
 }
 
-template <class T>
+
+template<>
+ImageBitmapFactories& ImageBitmapFactories::fromInternal(WorkerGlobalScope& object)
+{
+    ImageBitmapFactories* supplement = static_cast<ImageBitmapFactories*>(WillBeHeapSupplement<WorkerGlobalScope>::from(object, supplementName()));
+    if (!supplement) {
+        supplement = new ImageBitmapFactories();
+        WillBeHeapSupplement<WorkerGlobalScope>::provideTo(object, supplementName(), adoptPtrWillBeNoop(supplement));
+    }
+    return *supplement;
+}
+
+template<class T>
 ImageBitmapFactories& ImageBitmapFactories::fromInternal(T& object)
 {
     ImageBitmapFactories* supplement = static_cast<ImageBitmapFactories*>(Supplement<T>::from(object, supplementName()));
@@ -354,4 +366,8 @@ void ImageBitmapFactories::ImageBitmapLoader::didFail(FileError::ErrorCode)
     rejectPromise();
 }
 
+void ImageBitmapFactories::trace(Visitor*)
+{
+}
+
 } // namespace WebCore