bindings: Changes DOMWrapperMap::KeyType to ScriptWrappableBase*.

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 00fb70d629e333496bf0018fd6c5af6af70ac62a..4d5081be36a4d7bcd102972a56aeac745b22cc09 100644
--- a/Source/bindings/core/v8/DOMDataStore.h
+++ b/Source/bindings/core/v8/DOMDataStore.h
@@ -204,9 +204,19 @@ private:
     }
 
     bool m_isMainWorld;
-    DOMWrapperMap<void> m_wrapperMap;
+    DOMWrapperMap<ScriptWrappableBase> m_wrapperMap;
 };
 
+template <>
+inline void DOMWrapperMap<ScriptWrappableBase>::PersistentValueMapTraits::Dispose(
+    v8::Isolate* isolate,
+    v8::UniquePersistent<v8::Object> value,
+    ScriptWrappableBase* key)
+{
+    RELEASE_ASSERT(!value.IsEmpty()); // See crbug.com/368095.
+    releaseObject(v8::Local<v8::Object>::New(isolate, value));
+}
+
 } // namespace blink
 
 #endif // DOMDataStore_h