[runtime] [proxy] removing JSFunctionProxy and related code.

src/js/proxy.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();
 
 // ----------------------------------------------------------------------------
 // Imports
 //
 var GlobalProxy = global.Proxy;
 var GlobalFunction = global.Function;
 var GlobalObject = global.Object;
 var MakeTypeError;
 
 utils.Import(function(from) {
   MakeTypeError = from.MakeTypeError;
 });
 
-//----------------------------------------------------------------------------
-
-function ProxyCreateFunction(handler, callTrap, constructTrap) {
-  if (!IS_SPEC_OBJECT(handler))
-    throw MakeTypeError(kProxyHandlerNonObject, "createFunction")
-  if (!IS_CALLABLE(callTrap))
-    throw MakeTypeError(kProxyTrapFunctionExpected, "call")
-  if (IS_UNDEFINED(constructTrap)) {
-    constructTrap = DerivedConstructTrap(callTrap)
-  } else if (IS_CALLABLE(constructTrap)) {
-    // Make sure the trap receives 'undefined' as this.
-    var construct = constructTrap
-    constructTrap = function() {
-      return %Apply(construct, UNDEFINED, arguments, 0, %_ArgumentsLength());
-    }
-  } else {
-    throw MakeTypeError(kProxyTrapFunctionExpected, "construct")
-  }
-  return %CreateJSFunctionProxy(
-    {}, handler, callTrap, constructTrap, GlobalFunction.prototype)
-}
-
 // -------------------------------------------------------------------
 // Proxy Builtins
 
 function DerivedConstructTrap(callTrap) {
   return function() {
     var proto = this.prototype
     if (!IS_SPEC_OBJECT(proto)) proto = GlobalObject.prototype
     var obj = { __proto__: proto };
     var result = %Apply(callTrap, obj, arguments, 0, %_ArgumentsLength());
     return IS_SPEC_OBJECT(result) ? result : obj
@@ skipping 78 matching lines @@
     // If the iterator returns a non-string value, throw a TypeError.
     if (!IS_STRING(key)) {
       throw MakeTypeError(kProxyHandlerReturned, handler, "non-String",
                           "enumerate-iterator");
     }
     result.push(key);
   }
   return result;
 }
 
-//-------------------------------------------------------------------
-
-//Set up non-enumerable properties of the Proxy object.
-utils.InstallFunctions(GlobalProxy, DONT_ENUM, [
-  "createFunction", ProxyCreateFunction
-]);
-
 // -------------------------------------------------------------------
 // Exports
 
 utils.Export(function(to) {
   to.ProxyDelegateCallAndConstruct = DelegateCallAndConstruct;
   to.ProxyDerivedHasOwnTrap = DerivedHasOwnTrap;
 });
 
 %InstallToContext([
   "proxy_enumerate", ProxyEnumerate,
 ]);
 
 })