Address a FIXME in JSArray::sort
https://bugs.webkit.org/show_bug.cgi?id=98080
<rdar://problem/12407844>

Reviewed by Oliver Hunt.

Source/JavaScriptCore: 

Get rid of fast sorting of sparse maps. I don't know that it's broken but I do know that we don't
have coverage for it. Then also address the FIXME in JSArray::sort regarding side-effecting
compare functions.

* runtime/ArrayPrototype.cpp:
(JSC::arrayProtoFuncSort):
* runtime/JSArray.cpp:
(JSC::JSArray::sortNumeric):
(JSC::JSArray::sort):
(JSC::JSArray::compactForSorting):
* runtime/JSArray.h:
(JSArray):
* runtime/JSObject.h:
(JSC::JSObject::hasSparseMap):
(JSObject):

LayoutTests: 

* fast/js/jsc-test-list:
* fast/js/script-tests/sort-with-side-effecting-comparisons.js: Added.
* fast/js/sort-with-side-effecting-comparisons-expected.txt: Added.
* fast/js/sort-with-side-effecting-comparisons.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk/LayoutTests@130102 268f45cc-cd09-0410-ab3c-d52691b4dbfc