Add GetPropertyAttribute method for Object in the API

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 71a715c1bb28b20189b91421f7605518f9174f98..e2ca7f6ad66141327f7b94ece8a78417f18dc946 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -2712,6 +2712,22 @@ Local<Value> v8::Object::Get(uint32_t index) {
 }
 
 
+PropertyAttribute v8::Object::GetPropertyAttribute(v8::Handle<Value> key) {
+  i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
+  ON_BAILOUT(isolate, "v8::Object::GetPropertyAttribute()",
+             return static_cast<PropertyAttribute>(NONE));
+  ENTER_V8(isolate);
+  i::Handle<i::JSObject> self = Utils::OpenHandle(this);
+  i::Handle<i::Object> key_obj = Utils::OpenHandle(*key);
+  EXCEPTION_PREAMBLE(isolate);
+  i::Handle<i::String> name = i::Handle<i::String>::cast(key_obj);

[Mads Ager (chromium), 2011/07/12 07:51:30]

This will not work if you pass in some other object than a string (such as a
number or object). You should handle this in the same way that Object::Get is
handled. You need to convert the key to a string if it isn't already. 

+  PropertyAttributes result = self->GetPropertyAttribute(*name);
+  has_pending_exception = (result == ABSENT);

[Mads Ager (chromium), 2011/07/12 07:51:30]

Let's not misuse has_pending_exception for this. Just have the
EXCEPTION_BAILOUT_CHECK here. Then after that return
static_cast<PropertyAttribute>(NONE) if result is ABSENT.

+  EXCEPTION_BAILOUT_CHECK(isolate, static_cast<PropertyAttribute>(NONE));
+  return static_cast<PropertyAttribute>(result);
+}
+
+
 Local<Value> v8::Object::GetPrototype() {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate, "v8::Object::GetPrototype()",