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

src/runtime/runtime-test.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen.h"
 #include "src/runtime/runtime-utils.h"
@@ skipping 194 matching lines @@
 
 
 RUNTIME_FUNCTION(Runtime_GetOptimizationCount) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
   return Smi::FromInt(function->shared()->opt_count());
 }
 
 
+RUNTIME_FUNCTION(Runtime_GetUndetectable) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 0);
+
+  Local<v8::ObjectTemplate> desc =
+      v8::ObjectTemplate::New((v8::Isolate*)isolate);
+  desc->MarkAsUndetectable();  // undetectable
+  Local<v8::Object> obj = desc->NewInstance();
+  return *Utils::OpenHandle(*obj);
+}
+
+
 RUNTIME_FUNCTION(Runtime_ClearFunctionTypeFeedback) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
   function->shared()->ClearTypeFeedbackInfo();
   Code* unoptimized = function->shared()->code();
   if (unoptimized->kind() == Code::FUNCTION) {
     unoptimized->ClearInlineCaches();
   }
   return isolate->heap()->undefined_value();
@@ skipping 258 matching lines @@
   RUNTIME_FUNCTION(Runtime_HasFixed##Type##Elements) {                        \
     CONVERT_ARG_CHECKED(JSObject, obj, 0);                                    \
     return isolate->heap()->ToBoolean(obj->HasFixed##Type##Elements());       \
   }
 
 TYPED_ARRAYS(FIXED_TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION)
 
 #undef FIXED_TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION
 }
 }  // namespace v8::internal