Add "own" symbols support.

src/runtime.h

 // Copyright 2012 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_RUNTIME_H_
 #define V8_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/zone.h"
 
@@ skipping 241 matching lines @@
   /* ES5 */                                                           \
   F(ObjectFreeze, 1, 1)                                               \
                                                                       \
   /* Harmony modules */                                               \
   F(IsJSModule, 1, 1)                                                 \
                                                                       \
   /* Harmony symbols */                                               \
   F(CreateSymbol, 1, 1)                                               \
   F(CreatePrivateSymbol, 1, 1)                                        \
   F(CreateGlobalPrivateSymbol, 1, 1)                                  \
+  F(CreatePrivateOwnSymbol, 1, 1)                                     \
   F(NewSymbolWrapper, 1, 1)                                           \
   F(SymbolDescription, 1, 1)                                          \
   F(SymbolRegistry, 0, 1)                                             \
   F(SymbolIsPrivate, 1, 1)                                            \
                                                                       \
   /* Harmony proxies */                                               \
   F(CreateJSProxy, 2, 1)                                              \
   F(CreateJSFunctionProxy, 4, 1)                                      \
   F(IsJSProxy, 1, 1)                                                  \
   F(IsJSFunctionProxy, 1, 1)                                          \
@@ skipping 630 matching lines @@
 class AllocateDoubleAlignFlag:  public BitField<bool,            0, 1> {};
 class AllocateTargetSpace:      public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag:   public BitField<bool,       0, 1> {};
 class DeclareGlobalsNativeFlag: public BitField<bool,       1, 1> {};
 class DeclareGlobalsStrictMode: public BitField<StrictMode, 2, 1> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_