https://bugs.webkit.org/show_bug.cgi?id=68422
        
As discussed on webkit-dev. All ports build with threads enabled in JSC now.
        
This may break WinCE and other ports that have not built and tested with
this configuration. I've filed bugs for port maintainers. It's time for
WebKit to move forward.

Reviewed by Sam Weinig.

* API/APIShims.h:
(JSC::APIEntryShimWithoutLock::APIEntryShimWithoutLock):
* API/JSContextRef.cpp:
* heap/MachineStackMarker.cpp:
(JSC::MachineThreads::MachineThreads):
(JSC::MachineThreads::~MachineThreads):
(JSC::MachineThreads::gatherConservativeRoots):
* heap/MachineStackMarker.h:
* runtime/InitializeThreading.cpp:
(JSC::initializeThreadingOnce):
(JSC::initializeThreading):
* runtime/JSGlobalData.cpp:
(JSC::JSGlobalData::sharedInstance):
* runtime/JSGlobalData.h:
(JSC::JSGlobalData::makeUsableFromMultipleThreads):
* runtime/JSLock.cpp:
* runtime/Structure.cpp:
* wtf/Platform.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@95510 268f45cc-cd09-0410-ab3c-d52691b4dbfc