[es6] Implement parts of the Reflect object.

src/objects.cc

 // Copyright 2013 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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 5840 matching lines @@
   LookupIterator it(object->GetIsolate(), object, index,
                     LookupIterator::HIDDEN);
   return DeleteProperty(&it, language_mode);
 }
 
 
 MaybeHandle<Object> JSReceiver::DeleteProperty(Handle<JSReceiver> object,
                                                Handle<Name> name,
                                                LanguageMode language_mode) {
   LookupIterator it(object, name, LookupIterator::HIDDEN);
-  return JSObject::DeleteProperty(&it, language_mode);
+  return DeleteProperty(&it, language_mode);
 }
 
 
 MaybeHandle<Object> JSReceiver::DeletePropertyOrElement(
     Handle<JSReceiver> object, Handle<Name> name, LanguageMode language_mode) {
   LookupIterator it = LookupIterator::PropertyOrElement(
       name->GetIsolate(), object, name, LookupIterator::HIDDEN);
-  return JSObject::DeleteProperty(&it, language_mode);
+  return DeleteProperty(&it, language_mode);
 }
 
 
 bool JSObject::ReferencesObjectFromElements(FixedArray* elements,
                                             ElementsKind kind,
                                             Object* object) {
   DCHECK(IsFastObjectElementsKind(kind) ||
          kind == DICTIONARY_ELEMENTS);
   if (IsFastObjectElementsKind(kind)) {
     int length = IsJSArray()
@@ skipping 11030 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8