Have DOMDataStore::current() return a reference

Source/bindings/v8/DOMDataStore.cpp

Index: Source/bindings/v8/DOMDataStore.cpp
diff --git a/Source/bindings/v8/DOMDataStore.cpp b/Source/bindings/v8/DOMDataStore.cpp
index bbcac2b337fa65c7b8ec91c1e99134132eef33a2..2626f5c9af9c1533bf072377e88eec4afe42e44e 100644
--- a/Source/bindings/v8/DOMDataStore.cpp
+++ b/Source/bindings/v8/DOMDataStore.cpp
@@ -51,18 +51,18 @@ DOMDataStore::~DOMDataStore()
     m_wrapperMap.clear();
 }
 
-DOMDataStore* DOMDataStore::mainWorldStore()
+DOMDataStore& DOMDataStore::mainWorldStore()
 {
     DEFINE_STATIC_LOCAL(DOMDataStore, mainWorldDOMDataStore, (MainWorld));
     ASSERT(isMainThread());
-    return &mainWorldDOMDataStore;
+    return mainWorldDOMDataStore;
 }
 
-DOMDataStore* DOMDataStore::current(v8::Isolate* isolate)
+DOMDataStore& DOMDataStore::current(v8::Isolate* isolate)
 {
     V8PerIsolateData* data = isolate ? V8PerIsolateData::from(isolate) : V8PerIsolateData::current();
     if (UNLIKELY(!!data->workerDOMDataStore()))
-        return data->workerDOMDataStore();
+        return *data->workerDOMDataStore();
 
     if (DOMWrapperWorld::isolatedWorldsExist()) {
         DOMWrapperWorld* isolatedWorld = DOMWrapperWorld::isolatedWorld(v8::Context::GetEntered());