[es6] Partially implement Reflect.getOwnPropertyDescriptor.

src/bootstrapper.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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/utils/random-number-generator.h"
 #include "src/code-stubs.h"
@@ skipping 2179 matching lines @@
   Handle<JSObject> reflect =
       factory()->NewJSObject(isolate()->object_function(), TENURED);
   JSObject::AddProperty(global, reflect_string, reflect, DONT_ENUM);
 
   SimpleInstallFunction(reflect, "defineProperty",
                         Builtins::kReflectDefineProperty, 3, true);
   SimpleInstallFunction(reflect, "deleteProperty",
                         Builtins::kReflectDeleteProperty, 2, true);
   SimpleInstallFunction(reflect, "get",
                         Builtins::kReflectGet, 3, false);
+  SimpleInstallFunction(reflect, "getOwnPropertyDescriptor",
+                        Builtins::kReflectGetOwnPropertyDescriptor, 2, true);
   SimpleInstallFunction(reflect, "getPrototypeOf",
                         Builtins::kReflectGetPrototypeOf, 1, true);
   SimpleInstallFunction(reflect, "has",
                         Builtins::kReflectHas, 2, true);
   SimpleInstallFunction(reflect, "isExtensible",
                         Builtins::kReflectIsExtensible, 1, true);
   SimpleInstallFunction(reflect, "preventExtensions",
                         Builtins::kReflectPreventExtensions, 1, true);
   SimpleInstallFunction(reflect, "setPrototypeOf",
                         Builtins::kReflectSetPrototypeOf, 2, true);
@@ skipping 1112 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8