v8::Private::ForApi should be context-independent.

src/runtime/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_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include <memory>
 
 #include "src/allocation.h"
@@ skipping 822 matching lines @@
   F(FlattenString, 1, 1)                  \
   F(StringCharFromCode, 1, 1)             \
   F(ExternalStringGetChar, 2, 1)          \
   F(StringCharCodeAt, 2, 1)
 
 #define FOR_EACH_INTRINSIC_SYMBOL(F) \
   F(CreateSymbol, 1, 1)              \
   F(CreatePrivateSymbol, 1, 1)       \
   F(SymbolDescription, 1, 1)         \
   F(SymbolDescriptiveString, 1, 1)   \
-  F(SymbolRegistry, 0, 1)            \
   F(SymbolIsPrivate, 1, 1)
 
 #define FOR_EACH_INTRINSIC_TEST(F)            \
   F(ConstructDouble, 2, 1)                    \
   F(DeoptimizeFunction, 1, 1)                 \
   F(DeoptimizeNow, 0, 1)                      \
   F(RunningInSimulator, 0, 1)                 \
   F(IsConcurrentRecompilationSupported, 0, 1) \
   F(OptimizeFunctionOnNextCall, -1, 1)        \
   F(InterpretFunctionOnNextCall, 1, 1)        \
@@ skipping 280 matching lines @@
 
 class DeclareGlobalsEvalFlag : public BitField<bool, 0, 1> {};
 class DeclareGlobalsNativeFlag : public BitField<bool, 1, 1> {};
 STATIC_ASSERT(LANGUAGE_END == 2);
 class DeclareGlobalsLanguageMode : public BitField<LanguageMode, 2, 1> {};
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_