Get rid of custom code for Window.location attribute setter

Source/core/frame/Window.idl

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 23 matching lines @@
     [Replaceable] readonly attribute Screen screen;
     [Replaceable] readonly attribute History history;
     [Replaceable] readonly attribute BarProp locationbar;
     [Replaceable] readonly attribute BarProp menubar;
     [Replaceable] readonly attribute BarProp personalbar;
     [Replaceable] readonly attribute BarProp scrollbars;
     [Replaceable] readonly attribute BarProp statusbar;
     [Replaceable] readonly attribute BarProp toolbar;
     [Replaceable, PerWorldBindings, ActivityLogging=GetterForIsolatedWorlds] readonly attribute Navigator navigator;
     [Replaceable] readonly attribute Navigator clientInformation;
-    [DoNotCheckSecurity, CustomSetter, Unforgeable, Replaceable, PerWorldBindings, ActivityLogging=AccessForIsolatedWorlds] readonly attribute Location location;
+    [DoNotCheckSecurity, Unforgeable, Replaceable, PerWorldBindings, ActivityLogging=AccessForIsolatedWorlds, PutForwards=href] readonly attribute Location location;
     [Custom, MeasureAs=WindowEvent, NotEnumerable, Replaceable] readonly attribute Event event;
 
     Selection getSelection();
 
     [CheckSecurityForNode] readonly attribute Element frameElement;
 
     [DoNotCheckSecurity, CallWith=ExecutionContext] void focus();
     [DoNotCheckSecurity] void blur();
     [DoNotCheckSecurity, CallWith=ExecutionContext] void close();
 
@@ skipping 251 matching lines @@
     // window.toString() requires special handling in V8
     [DoNotCheckSignature, DoNotCheckSecurity, Custom, NotEnumerable] DOMString toString();
 
     [ImplementedAs=anonymousIndexedGetter, NotEnumerable] getter Window(unsigned long index);
     [Custom, NotEnumerable] getter Window (DOMString name);
 };
 
 Window implements ImageBitmapFactories;
 Window implements WindowTimers;
 Window implements WindowBase64;