Unreviewed, rolling out r143348.
http://trac.webkit.org/changeset/143348
https://bugs.webkit.org/show_bug.cgi?id=110242

"Caused a deleted value sentinel crash on the layout tests"
(Requested by ggaren on #webkit).

Patch by Sheriff Bot <webkit.review.bot@gmail.com> on 2013-02-19

* runtime/CodeCache.cpp:
(JSC::CodeCache::getFunctionExecutableFromGlobalCode):
* runtime/CodeCache.h:
(JSC::SourceCodeKey::SourceCodeKey):
(JSC::SourceCodeKey::isHashTableDeletedValue):
(JSC::SourceCodeKey::hash):
(JSC::SourceCodeKey::length):
(JSC::SourceCodeKey::isNull):
(JSC::SourceCodeKey::operator==):
(SourceCodeKey):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@143366 268f45cc-cd09-0410-ab3c-d52691b4dbfc