Remove GetDefaultReceiver, pass in undefined to sloppy-mode functions instead.

src/harmony-array.js

 // Copyright 2013 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() {
 
 'use strict';
 
 %CheckIsBootstrapping();
 
@@ skipping 65 matching lines @@
   if (!IS_SPEC_FUNCTION(predicate)) {
     throw MakeTypeError(kCalledNonCallable, predicate);
   }
 
   var thisArg;
   if (%_ArgumentsLength() > 1) {
     thisArg = %_Arguments(1);
   }
 
   var needs_wrapper = false;
-  if (IS_NULL_OR_UNDEFINED(thisArg)) {
-    thisArg = %GetDefaultReceiver(predicate) || thisArg;
-  } else {
+  if (IS_NULL(thisArg)) {
+    if (%IsSloppyModeFunction(predicate)) thisArg = UNDEFINED;
+  } else if (!IS_UNDEFINED(thisArg)) {
     needs_wrapper = SHOULD_CREATE_WRAPPER(predicate, thisArg);
   }
 
   for (var i = 0; i < length; i++) {
     if (i in array) {
       var element = array[i];
       var newThisArg = needs_wrapper ? ToObject(thisArg) : thisArg;
       if (%_CallFunction(newThisArg, element, i, array, predicate)) {
         return element;
       }
@@ skipping 14 matching lines @@
   if (!IS_SPEC_FUNCTION(predicate)) {
     throw MakeTypeError(kCalledNonCallable, predicate);
   }
 
   var thisArg;
   if (%_ArgumentsLength() > 1) {
     thisArg = %_Arguments(1);
   }
 
   var needs_wrapper = false;
-  if (IS_NULL_OR_UNDEFINED(thisArg)) {
-    thisArg = %GetDefaultReceiver(predicate) || thisArg;
-  } else {
+  if (IS_NULL(thisArg)) {
+    if (%IsSloppyModeFunction(predicate)) thisArg = UNDEFINED;
+  } else if (!IS_UNDEFINED(thisArg)) {
     needs_wrapper = SHOULD_CREATE_WRAPPER(predicate, thisArg);
   }
 
   for (var i = 0; i < length; i++) {
     if (i in array) {
       var element = array[i];
       var newThisArg = needs_wrapper ? ToObject(thisArg) : thisArg;
       if (%_CallFunction(newThisArg, element, i, array, predicate)) {
         return i;
       }
@@ skipping 47 matching lines @@
 }
 
 // ES6, draft 10-14-14, section 22.1.2.1
 function ArrayFrom(arrayLike, mapfn, receiver) {
   var items = ToObject(arrayLike);
   var mapping = !IS_UNDEFINED(mapfn);
 
   if (mapping) {
     if (!IS_SPEC_FUNCTION(mapfn)) {
       throw MakeTypeError(kCalledNonCallable, mapfn);
-    } else if (IS_NULL_OR_UNDEFINED(receiver)) {
-      receiver = %GetDefaultReceiver(mapfn) || receiver;
-    } else if (!IS_SPEC_OBJECT(receiver) && %IsSloppyModeFunction(mapfn)) {
-      receiver = ToObject(receiver);
+    } else if (%IsSloppyModeFunction(mapfn)) {
+      if (IS_NULL(receiver)) {
+        receiver = UNDEFINED;
+      } else if (!IS_UNDEFINED(receiver)) {
+        receiver = TO_OBJECT_INLINE(receiver);
+      }
     }
   }
 
   var iterable = GetMethod(items, symbolIterator);
   var k;
   var result;
   var mappedValue;
   var nextValue;
 
   if (!IS_UNDEFINED(iterable)) {
@@ skipping 72 matching lines @@
 
 // Set up the non-enumerable functions on the Array prototype object.
 InstallFunctions(GlobalArray.prototype, DONT_ENUM, [
   "copyWithin", ArrayCopyWithin,
   "find", ArrayFind,
   "findIndex", ArrayFindIndex,
   "fill", ArrayFill
 ]);
 
 })();