[V8] Add v8::Value::TypeOf to API

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 8c8f5df13714e2f73a71967c25a4651bf8830b61..7ca2a371172e6ed4d2eebee5c0510ca62aeddb79 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -3515,6 +3515,14 @@ bool Value::SameValue(Local<Value> that) const {
   return self->SameValue(*other);
 }
 
+MaybeLocal<String> Value::TypeOf(v8::Local<v8::Context> context) {
+  PREPARE_FOR_EXECUTION(context, "TypeOf", String);
+  i::Handle<i::String> result =
+      i::Object::TypeOf(isolate, Utils::OpenHandle(this));
+  has_pending_exception = result.is_null();

[jochen (gone - plz use gerrit), 2016/03/30 16:15:13]

sorry for not catching this earlier, but as far as I can tell, result can never
be null. 

[kozy, 2016/05/06 17:03:13]

Rewritten without PREPATE_FOR_EXECUTION

+  RETURN_ON_FAILED_EXECUTION(String);
+  RETURN_ESCAPED(Utils::ToLocal(result));
+}
 
 Maybe<bool> v8::Object::Set(v8::Local<v8::Context> context,
                             v8::Local<Value> key, v8::Local<Value> value) {