[es6] Partially implement Reflect.preventExtensions.

src/builtins.h

 // Copyright 2011 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.
 
 #ifndef V8_BUILTINS_H_
 #define V8_BUILTINS_H_
 
 #include "src/handles.h"
 
 namespace v8 {
@@ skipping 45 matching lines @@
   V(ArraySlice, NO_EXTRA_ARGUMENTS)                          \
   V(ArraySplice, NO_EXTRA_ARGUMENTS)                         \
   V(ArrayConcat, NO_EXTRA_ARGUMENTS)                         \
                                                              \
   V(DateToPrimitive, NO_EXTRA_ARGUMENTS)                     \
                                                              \
   V(ReflectDeleteProperty, NO_EXTRA_ARGUMENTS)               \
   V(ReflectGet, NO_EXTRA_ARGUMENTS)                          \
   V(ReflectHas, NO_EXTRA_ARGUMENTS)                          \
   V(ReflectIsExtensible, NO_EXTRA_ARGUMENTS)                 \
+  V(ReflectPreventExtensions, NO_EXTRA_ARGUMENTS)            \
                                                              \
   V(SymbolConstructor, NO_EXTRA_ARGUMENTS)                   \
   V(SymbolConstructor_ConstructStub, NO_EXTRA_ARGUMENTS)     \
                                                              \
   V(HandleApiCall, NEEDS_CALLED_FUNCTION)                    \
   V(HandleApiCallConstruct, NEEDS_CALLED_FUNCTION)           \
   V(HandleApiCallAsFunction, NO_EXTRA_ARGUMENTS)             \
   V(HandleApiCallAsConstructor, NO_EXTRA_ARGUMENTS)          \
                                                              \
   V(RestrictedFunctionPropertiesThrower, NO_EXTRA_ARGUMENTS) \
@@ skipping 254 matching lines @@
   friend class BuiltinFunctionTable;
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_H_