Add support for per-isolate private symbols

src/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 172 matching lines @@
   V(UnseededNumberDictionary, non_monomorphic_cache, NonMonomorphicCache)      \
   V(PolymorphicCodeCache, polymorphic_code_cache, PolymorphicCodeCache)        \
   V(Code, js_entry_code, JsEntryCode)                                          \
   V(Code, js_construct_entry_code, JsConstructEntryCode)                       \
   V(FixedArray, natives_source_cache, NativesSourceCache)                      \
   V(Script, empty_script, EmptyScript)                                         \
   V(NameDictionary, intrinsic_function_names, IntrinsicFunctionNames)          \
   V(Cell, undefined_cell, UndefineCell)                                        \
   V(JSObject, observation_state, ObservationState)                             \
   V(Map, external_map, ExternalMap)                                            \
-  V(JSObject, symbol_registry, SymbolRegistry)                                 \
+  V(Object, symbol_registry, SymbolRegistry)                                   \
   V(Symbol, frozen_symbol, FrozenSymbol)                                       \
   V(Symbol, nonexistent_symbol, NonExistentSymbol)                             \
   V(Symbol, elements_transition_symbol, ElementsTransitionSymbol)              \
   V(SeededNumberDictionary, empty_slow_element_dictionary,                     \
       EmptySlowElementDictionary)                                              \
   V(Symbol, observed_symbol, ObservedSymbol)                                   \
   V(Symbol, uninitialized_symbol, UninitializedSymbol)                         \
   V(Symbol, megamorphic_symbol, MegamorphicSymbol)                             \
   V(FixedArray, materialized_objects, MaterializedObjects)                     \
   V(FixedArray, allocation_sites_scratchpad, AllocationSitesScratchpad)        \
@@ skipping 95 matching lines @@
   V(input_string, "input")                                               \
   V(index_string, "index")                                               \
   V(last_index_string, "lastIndex")                                      \
   V(object_string, "object")                                             \
   V(literals_string, "literals")                                         \
   V(prototype_string, "prototype")                                       \
   V(string_string, "string")                                             \
   V(String_string, "String")                                             \
   V(symbol_string, "symbol")                                             \
   V(Symbol_string, "Symbol")                                             \
+  V(for_string, "for")                                                   \
+  V(for_api_string, "for_api")                                           \
+  V(for_intern_string, "for_intern")                                     \
+  V(private_api_string, "private_api")                                   \
+  V(private_intern_string, "private_intern")                             \
   V(Date_string, "Date")                                                 \
   V(this_string, "this")                                                 \
   V(to_string_string, "toString")                                        \
   V(char_at_string, "CharAt")                                            \
   V(undefined_string, "undefined")                                       \
   V(value_of_string, "valueOf")                                          \
   V(stack_string, "stack")                                               \
   V(toJSON_string, "toJSON")                                             \
   V(InitializeVarGlobal_string, "InitializeVarGlobal")                   \
   V(InitializeConstGlobal_string, "InitializeConstGlobal")               \
@@ skipping 2804 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_