Reland: Reland: Implement new Blink IDL attribute [SetReference]

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..39366c7a45b34d5f7e5be89d68fd781ae37b7341 100644
--- a/Source/bindings/v8/DOMDataStore.cpp
+++ b/Source/bindings/v8/DOMDataStore.cpp
@@ -65,9 +65,12 @@ DOMDataStore* DOMDataStore::current(v8::Isolate* isolate)
         return data->workerDOMDataStore();
 
     if (DOMWrapperWorld::isolatedWorldsExist()) {
-        DOMWrapperWorld* isolatedWorld = DOMWrapperWorld::isolatedWorld(v8::Context::GetEntered());
-        if (UNLIKELY(!!isolatedWorld))
-            return isolatedWorld->isolatedWorldDOMDataStore();
+        v8::Local<v8::Context> context = v8::Context::GetEntered();
+        if (!context.IsEmpty()) {

[haraken, 2013/10/25 05:21:23]

This change makes sense. "If there is no entered context, let's think that the
main world store is the current world store", which makes sense to me.

+            DOMWrapperWorld* isolatedWorld = DOMWrapperWorld::isolatedWorld(context);
+            if (UNLIKELY(!!isolatedWorld))
+                return isolatedWorld->isolatedWorldDOMDataStore();
+        }
     }
 
     return mainWorldStore();