Gin: Make it easier to implement Wrappable

gin/wrappable.cc

Index: gin/wrappable.cc
diff --git a/gin/wrappable.cc b/gin/wrappable.cc
index 0338211070af79b655a04895d2114135becd4b35..03152e35d79a20a4eae10806256152dcb28ed791 100644
--- a/gin/wrappable.cc
+++ b/gin/wrappable.cc
@@ -9,27 +9,31 @@
 
 namespace gin {
 
-Wrappable::Wrappable() {
+WrapperInfo* WrappableTraitsTest::GetWrapperInfo() {
+  return &WrappableTraits<WrappableTraitsTest>::kWrapperInfo;
 }
 
-Wrappable::~Wrappable() {
+WrappableBase::WrappableBase() {
+}
+
+WrappableBase::~WrappableBase() {
   wrapper_.Reset();
 }
 
-v8::Handle<v8::Object> Wrappable::GetWrapper(v8::Isolate* isolate) {
+v8::Handle<v8::Object> WrappableBase::GetWrapper(v8::Isolate* isolate) {
   if (wrapper_.IsEmpty())
     CreateWrapper(isolate);
   return v8::Local<v8::Object>::New(isolate, wrapper_);
 }
 
-void Wrappable::WeakCallback(
-    const v8::WeakCallbackData<v8::Object, Wrappable>& data) {
-  Wrappable* wrappable = data.GetParameter();
+void WrappableBase::WeakCallback(
+    const v8::WeakCallbackData<v8::Object, WrappableBase>& data) {
+  WrappableBase* wrappable = data.GetParameter();
   wrappable->wrapper_.Reset();
   delete wrappable;
 }
 
-v8::Handle<v8::Object> Wrappable::CreateWrapper(v8::Isolate* isolate) {
+v8::Handle<v8::Object> WrappableBase::CreateWrapper(v8::Isolate* isolate) {
   WrapperInfo* info = GetWrapperInfo();
   PerIsolateData* data = PerIsolateData::From(isolate);
   v8::Local<v8::ObjectTemplate> templ = data->GetObjectTemplate(info);