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

Source/bindings/v8/DOMDataStore.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 47 matching lines @@
     return &mainWorldDOMDataStore;
 }
 
 DOMDataStore* DOMDataStore::current(v8::Isolate* isolate)
 {
     V8PerIsolateData* data = isolate ? V8PerIsolateData::from(isolate) : V8PerIsolateData::current();
     if (UNLIKELY(!!data->workerDOMDataStore()))
         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();
 }
 
 } // namespace WebCore