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

Source/bindings/v8/V8GCController.cpp

Index: Source/bindings/v8/V8GCController.cpp
diff --git a/Source/bindings/v8/V8GCController.cpp b/Source/bindings/v8/V8GCController.cpp
index 14779ed5953c2c0ee2f87ea2e907b989f0b888b9..483d6480c733435afe8ee098cce49b29528bc2b1 100644
--- a/Source/bindings/v8/V8GCController.cpp
+++ b/Source/bindings/v8/V8GCController.cpp
@@ -284,8 +284,8 @@ public:
                 m_groupsWhichNeedRetainerInfo.append(root);
         } else if (classId == v8DOMObjectClassId) {
             ASSERT(!value->IsIndependent());
-            void* root = type->opaqueRootForGC(object, m_isolate);
-            m_isolate->SetObjectGroupId(*value, v8::UniqueId(reinterpret_cast<intptr_t>(root)));
+            v8::Persistent<v8::Object>* wrapperPersistent = reinterpret_cast<v8::Persistent<v8::Object>*>(value);
+            type->resolveWrapperReachability(object, *wrapperPersistent, m_isolate);
         } else {
             ASSERT_NOT_REACHED();
         }