Revert of Hook up more import/exports in natives.

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();
 
 // -----------------------------------------------------------------------
 // Utils
 
 var imports = UNDEFINED;
 var exports = UNDEFINED;
-var imports_from_experimental = UNDEFINED;
 
 
-// Export to other scripts.
-// In normal natives, this exports functions to other normal natives.
-// In experimental natives, this exports to other experimental natives and
-// to normal natives that import using utils.ImportFromExperimental.
-function Export(f) {
+utils.Export = function Export(f) {
   f.next = exports;
   exports = f;
 };
 
 
-// Import from other scripts.
-// In normal natives, this imports from other normal natives.
-// In experimental natives, this imports from other experimental natives and
-// whitelisted exports from normal natives.
-function Import(f) {
+utils.Import = function Import(f) {
   f.next = imports;
   imports = f;
 };
 
-
-// In normal natives, import from experimental natives.
-// Not callable from experimental natives.
-function ImportFromExperimental(f) {
-  f.next = imports_from_experimental;
-  imports_from_experimental = f;
-};
-
-
-function SetFunctionName(f, name, prefix) {
-  if (IS_SYMBOL(name)) {
-    name = "[" + %SymbolDescription(name) + "]";
-  }
-  if (IS_UNDEFINED(prefix)) {
-    %FunctionSetName(f, name);
-  } else {
-    %FunctionSetName(f, prefix + " " + name);
-  }
-}
-
-
-function InstallConstants(object, constants) {
-  %CheckIsBootstrapping();
-  %OptimizeObjectForAddingMultipleProperties(object, constants.length >> 1);
-  var attributes = DONT_ENUM | DONT_DELETE | READ_ONLY;
-  for (var i = 0; i < constants.length; i += 2) {
-    var name = constants[i];
-    var k = constants[i + 1];
-    %AddNamedProperty(object, name, k, attributes);
-  }
-  %ToFastProperties(object);
-}
-
-
-function InstallFunctions(object, attributes, functions) {
-  %CheckIsBootstrapping();
-  %OptimizeObjectForAddingMultipleProperties(object, functions.length >> 1);
-  for (var i = 0; i < functions.length; i += 2) {
-    var key = functions[i];
-    var f = functions[i + 1];
-    SetFunctionName(f, key);
-    %FunctionRemovePrototype(f);
-    %AddNamedProperty(object, key, f, attributes);
-    %SetNativeFlag(f);
-  }
-  %ToFastProperties(object);
-}
-
-
-// Helper function to install a getter-only accessor property.
-function InstallGetter(object, name, getter, attributes) {
-  %CheckIsBootstrapping();
-  if (typeof attributes == "undefined") {
-    attributes = DONT_ENUM;
-  }
-  SetFunctionName(getter, name, "get");
-  %FunctionRemovePrototype(getter);
-  %DefineAccessorPropertyUnchecked(object, name, getter, null, attributes);
-  %SetNativeFlag(getter);
-}
-
-
-// Helper function to install a getter/setter accessor property.
-function InstallGetterSetter(object, name, getter, setter) {
-  %CheckIsBootstrapping();
-  SetFunctionName(getter, name, "get");
-  SetFunctionName(setter, name, "set");
-  %FunctionRemovePrototype(getter);
-  %FunctionRemovePrototype(setter);
-  %DefineAccessorPropertyUnchecked(object, name, getter, setter, DONT_ENUM);
-  %SetNativeFlag(getter);
-  %SetNativeFlag(setter);
-}
-
-
-// Prevents changes to the prototype of a built-in function.
-// The "prototype" property of the function object is made non-configurable,
-// and the prototype object is made non-extensible. The latter prevents
-// changing the __proto__ property.
-function SetUpLockedPrototype(
-    constructor, fields, methods) {
-  %CheckIsBootstrapping();
-  var prototype = constructor.prototype;
-  // Install functions first, because this function is used to initialize
-  // PropertyDescriptor itself.
-  var property_count = (methods.length >> 1) + (fields ? fields.length : 0);
-  if (property_count >= 4) {
-    %OptimizeObjectForAddingMultipleProperties(prototype, property_count);
-  }
-  if (fields) {
-    for (var i = 0; i < fields.length; i++) {
-      %AddNamedProperty(prototype, fields[i],
-                        UNDEFINED, DONT_ENUM | DONT_DELETE);
-    }
-  }
-  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);
-}
-
 // -----------------------------------------------------------------------
 // To be called by bootstrapper
 
-var experimental_exports = UNDEFINED;
-
-function PostNatives(utils) {
+utils.PostNatives = function() {
   %CheckIsBootstrapping();
 
   var container = {};
   for ( ; !IS_UNDEFINED(exports); exports = exports.next) exports(container);
   for ( ; !IS_UNDEFINED(imports); imports = imports.next) imports(container);
 
-  // Whitelist of exports from normal natives to experimental natives.
   var expose_to_experimental = [
-    "GetIterator",
-    "GetMethod",
-    "InnerArrayEvery",
-    "InnerArrayFilter",
-    "InnerArrayForEach",
-    "InnerArrayIndexOf",
-    "InnerArrayLastIndexOf",
-    "InnerArrayMap",
-    "InnerArrayReverse",
-    "InnerArraySome",
-    "InnerArraySort",
-    "IsNaN",
     "MathMax",
     "MathMin",
-    "ObjectIsFrozen",
-    "OwnPropertyKeys",
-    "ToNameArray",
   ];
-  experimental_exports = {};
+  var experimental = {};
   %OptimizeObjectForAddingMultipleProperties(
-      experimental_exports, expose_to_experimental.length);
-  for (var key of expose_to_experimental) {
-    experimental_exports[key] = container[key];
-  }
-  %ToFastProperties(experimental_exports);
+      experimental, expose_to_experimental.length);
+  for (var key of expose_to_experimental) experimental[key] = container[key];
+  %ToFastProperties(experimental);
   container = UNDEFINED;
 
+  utils.Export = UNDEFINED;
   utils.PostNatives = UNDEFINED;
-  utils.ImportFromExperimental = UNDEFINED;
+  utils.Import = function ImportFromExperimental(f) {
+    f(experimental);
+  };
 };
 
-
-function PostExperimentals(utils) {
-  %CheckIsBootstrapping();
-
-  for ( ; !IS_UNDEFINED(exports); exports = exports.next) {
-    exports(experimental_exports);
-  }
-  for ( ; !IS_UNDEFINED(imports); imports = imports.next) {
-    imports(experimental_exports);
-  }
-  for ( ; !IS_UNDEFINED(imports_from_experimental);
-          imports_from_experimental = imports_from_experimental.next) {
-    imports_from_experimental(experimental_exports);
-  }
-
-  experimental_exports = UNDEFINED;
-
-  utils.PostExperimentals = UNDEFINED;
-  utils.Import = UNDEFINED;
-  utils.Export = UNDEFINED;
-};
-
-// -----------------------------------------------------------------------
-
-InstallFunctions(utils, NONE, [
-  "Import", Import,
-  "Export", Export,
-  "ImportFromExperimental", ImportFromExperimental,
-  "SetFunctionName", SetFunctionName,
-  "InstallConstants", InstallConstants,
-  "InstallFunctions", InstallFunctions,
-  "InstallGetter", InstallGetter,
-  "InstallGetterSetter", InstallGetterSetter,
-  "SetUpLockedPrototype", SetUpLockedPrototype,
-  "PostNatives", PostNatives,
-  "PostExperimentals", PostExperimentals,
-]);
-
 })