Add %GetUndetectable() test intrinsic and add tests for undetectables.

src/runtime/runtime-test.cc

Index: src/runtime/runtime-test.cc
diff --git a/src/runtime/runtime-test.cc b/src/runtime/runtime-test.cc
index 4c49d327b2b710ed0b52086adca01017ae115460..4afdd55c2c344889d9e890ed26d4282211c1abef 100644
--- a/src/runtime/runtime-test.cc
+++ b/src/runtime/runtime-test.cc
@@ -212,6 +212,18 @@ RUNTIME_FUNCTION(Runtime_GetOptimizationCount) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_GetUndetectable) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 0);
+
+  Local<v8::FunctionTemplate> desc =
+      v8::FunctionTemplate::New((v8::Isolate*)isolate);
+  desc->InstanceTemplate()->MarkAsUndetectable();  // undetectable

[Toon Verwaest, 2015/05/11 09:46:34]

Seems like you just want a v8::ObjectTemplate here.

[titzer, 2015/05/11 10:48:42]

Done.

+  Local<v8::Object> obj = desc->GetFunction()->NewInstance();
+  return *Utils::OpenHandle(*obj);
+}
+
+
 RUNTIME_FUNCTION(Runtime_ClearFunctionTypeFeedback) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);