Native context: do not put public symbols and flags on the js builtins object.

src/factory.h

 // Copyright 2014 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_FACTORY_H_
 #define V8_FACTORY_H_
 
 #include "src/isolate.h"
 #include "src/messages.h"
 
@@ skipping 597 matching lines @@
 #undef STRING_ACCESSOR
 
 #define SYMBOL_ACCESSOR(name)                                   \
   inline Handle<Symbol> name() {                                \
     return Handle<Symbol>(bit_cast<Symbol**>(                   \
         &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \
   }
   PRIVATE_SYMBOL_LIST(SYMBOL_ACCESSOR)
 #undef SYMBOL_ACCESSOR
 
-#define SYMBOL_ACCESSOR(name, varname, description)             \
+#define SYMBOL_ACCESSOR(name, description)                      \
   inline Handle<Symbol> name() {                                \
     return Handle<Symbol>(bit_cast<Symbol**>(                   \
         &isolate()->heap()->roots_[Heap::k##name##RootIndex])); \
   }
   PUBLIC_SYMBOL_LIST(SYMBOL_ACCESSOR)
 #undef SYMBOL_ACCESSOR
 
   // Allocates a new SharedFunctionInfo object.
   Handle<SharedFunctionInfo> NewSharedFunctionInfo(
       Handle<String> name, int number_of_literals, FunctionKind kind,
@@ skipping 92 matching lines @@
   // Reinitialize a JSProxy into an (empty) JS object of respective type and
   // size, but keeping the original prototype.  The receiver must have at least
   // the size of the new object.  The object is reinitialized and behaves as an
   // object that has been freshly allocated.
   void ReinitializeJSProxy(Handle<JSProxy> proxy, InstanceType type, int size);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_FACTORY_H_