Build fix.

* WebCore.exp.in:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149842 268f45cc-cd09-0410-ab3c-d52691b4dbfc
[DRT] Replace JavaScriptThreadingPthreads.cpp with JavaScriptThreading.cpp
https://bugs.webkit.org/show_bug.cgi?id=92505

Reviewed by Brent Fulgham.

* DumpRenderTree/DumpRenderTree.xcodeproj/project.pbxproj:
* DumpRenderTree/JavaScriptThreading.cpp: Copied from DumpRenderTree/pthreads/JavaScriptThreadingPthreads.cpp.
(javaScriptThreadsMutex):
(javaScriptThreads):
(runJavaScriptThread):
(startJavaScriptThreads):
(stopJavaScriptThreads):
* DumpRenderTree/pthreads: Removed.
* DumpRenderTree/pthreads/JavaScriptThreadingPthreads.cpp: Removed.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149843 268f45cc-cd09-0410-ab3c-d52691b4dbfc