bindings: Explicitly passes a v8::Isolate to DOMDataStore.

Source/bindings/core/v8/DOMDataStore.h

Index: Source/bindings/core/v8/DOMDataStore.h
diff --git a/Source/bindings/core/v8/DOMDataStore.h b/Source/bindings/core/v8/DOMDataStore.h
index dc61d83188e7169ea4a7c68cdbd7b8e1ed5c5ff5..2d6d11b0e504c685502673e8e34a4f70f4a6678f 100644
--- a/Source/bindings/core/v8/DOMDataStore.h
+++ b/Source/bindings/core/v8/DOMDataStore.h
@@ -46,9 +46,9 @@ class Node;
 class DOMDataStore {
     WTF_MAKE_NONCOPYABLE(DOMDataStore);
 public:
-    explicit DOMDataStore(bool isMainWorld)
+    DOMDataStore(v8::Isolate* isolate, bool isMainWorld)
         : m_isMainWorld(isMainWorld)
-        , m_wrapperMap(v8::Isolate::GetCurrent()) { }
+        , m_wrapperMap(isolate) { }
     ~DOMDataStore()
     {
         // We never actually destruct the main world's DOMDataStore.