Oilpan: make DataObject and SharedWorker heap Supplementables.

Source/modules/filesystem/DraggedIsolatedFileSystem.cpp

Index: Source/modules/filesystem/DraggedIsolatedFileSystem.cpp
diff --git a/Source/modules/filesystem/DraggedIsolatedFileSystem.cpp b/Source/modules/filesystem/DraggedIsolatedFileSystem.cpp
index 1e8f22a36e9252e840c6154a367319c5d626a966..e0abfdc218bcb1dd7bec7faf75867095425e387a 100644
--- a/Source/modules/filesystem/DraggedIsolatedFileSystem.cpp
+++ b/Source/modules/filesystem/DraggedIsolatedFileSystem.cpp
@@ -58,9 +58,19 @@ const char* DraggedIsolatedFileSystem::supplementName()
     return "DraggedIsolatedFileSystem";
 }
 
+DraggedIsolatedFileSystem* DraggedIsolatedFileSystem::from(DataObject* dataObject)
+{
+    return static_cast<DraggedIsolatedFileSystem*>(WillBeHeapSupplement<DataObject>::from(dataObject, supplementName()));
+}
+
 DraggedIsolatedFileSystem::DraggedIsolatedFileSystem(const String& filesystemId)
     : m_filesystemId(filesystemId)
 {
 }
 
+void DraggedIsolatedFileSystem::trace(Visitor* visitor)
+{
+    visitor->trace(m_filesystem);
+}
+
 } // namespace WebCore