https://bugs.webkit.org/show_bug.cgi?id=71336

Reviewed by Darin Adler.

Source/JavaScriptCore: 

* debugger/DebuggerActivation.cpp:
* debugger/DebuggerActivation.h:
Remove overrides of lookupGetter/lookupSetter, which are no longer needed
due to implementing getPropertyDescriptor.

* runtime/JSObject.cpp:
(JSC::JSObject::lookupGetter):
(JSC::JSObject::lookupSetter):
* runtime/JSObject.h:
De-virtualize lookupGetter/lookupSetter, and implement them in terms of
getPropertyDescriptor.

Source/WebCore: 

* bindings/js/JSDOMWindowCustom.cpp:
* bindings/js/JSDOMWindowShell.cpp:
* bindings/js/JSDOMWindowShell.h:
* page/DOMWindow.idl:
Remove overrides of lookupGetter/lookupSetter, which are no longer needed
due to implementing getPropertyDescriptor.

LayoutTests: 

* fast/dom/getter-on-window-object2-expected.txt:
Update results now that __lookupGetter__/__lookupSetter__ match getOwnPropertyDescriptor.
The failures are tracked by https://bugs.webkit.org/show_bug.cgi?id=71333.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@99034 268f45cc-cd09-0410-ab3c-d52691b4dbfc