Unify symbols sharing across native scripts and runtime.

src/prologue.js

 // Copyright 2015 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.
 
 (function(global, utils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
@@ skipping 138 matching lines @@
   for (var i = 0; i < methods.length; i += 2) {
     var key = methods[i];
     var f = methods[i + 1];
     %AddNamedProperty(prototype, key, f, DONT_ENUM | DONT_DELETE | READ_ONLY);
     %SetNativeFlag(f);
   }
   %InternalSetPrototype(prototype, null);
   %ToFastProperties(prototype);
 }
 
+
+var private_symbols = %ExportPrivateSymbols({});
+
+function GetPrivateSymbol(name) {
+  return private_symbols[name];
+}
+
 // -----------------------------------------------------------------------
 // To be called by bootstrapper
 
 function PostNatives(utils) {
   %CheckIsBootstrapping();
 
   for ( ; !IS_UNDEFINED(imports); imports = imports.next) {
     imports(exports_container);
   }
 
@@ skipping 60 matching lines @@
     imports_from_experimental(exports_container);
   }
   var runtime_container = {};
   for ( ; !IS_UNDEFINED(exports_to_runtime);
           exports_to_runtime = exports_to_runtime.next) {
     exports_to_runtime(runtime_container);
   }
   %ImportExperimentalToRuntime(runtime_container);
 
   exports_container = UNDEFINED;
+  private_symbols = UNDEFINED;
 
   utils.PostExperimentals = UNDEFINED;
   utils.PostDebug = UNDEFINED;
   utils.Import = UNDEFINED;
   utils.Export = UNDEFINED;
 }
 
 
 function PostDebug(utils) {
   for ( ; !IS_UNDEFINED(imports); imports = imports.next) {
     imports(exports_container);
   }
 
   exports_container = UNDEFINED;
+  private_symbols = UNDEFINED;
 
   utils.PostDebug = UNDEFINED;
   utils.PostExperimentals = UNDEFINED;
   utils.Import = UNDEFINED;
   utils.Export = UNDEFINED;
 }
 
 // -----------------------------------------------------------------------
 
-%OptimizeObjectForAddingMultipleProperties(utils, 14);
+%OptimizeObjectForAddingMultipleProperties(utils, 15);
 
 utils.Import = Import;
 utils.ImportNow = ImportNow;
 utils.Export = Export;
 utils.ExportToRuntime = ExportToRuntime;
 utils.ImportFromExperimental = ImportFromExperimental;
+utils.GetPrivateSymbol = GetPrivateSymbol;
 utils.SetFunctionName = SetFunctionName;
 utils.InstallConstants = InstallConstants;
 utils.InstallFunctions = InstallFunctions;
 utils.InstallGetter = InstallGetter;
 utils.InstallGetterSetter = InstallGetterSetter;
 utils.SetUpLockedPrototype = SetUpLockedPrototype;
 utils.PostNatives = PostNatives;
 utils.PostExperimentals = PostExperimentals;
 utils.PostDebug = PostDebug;
 
 %ToFastProperties(utils);
 
 })