https://bugs.webkit.org/show_bug.cgi?id=118573

Patch by Yi Shen <max.hong.shen@gmail.com> on 2013-07-25
Reviewed by Geoffrey Garen.

Remove the thread lock from API Shims if the VM has an exclusive thread (e.g. the VM
only used by WebCore's main thread).

Source/JavaScriptCore:

* API/APIShims.h:
(JSC::APIEntryShim::APIEntryShim):
(JSC::APICallbackShim::APICallbackShim):
* runtime/JSLock.cpp:
(JSC::JSLockHolder::JSLockHolder):
(JSC::JSLockHolder::init):
(JSC::JSLockHolder::~JSLockHolder):
(JSC::JSLock::DropAllLocks::DropAllLocks):
(JSC::JSLock::DropAllLocks::~DropAllLocks):
* runtime/VM.cpp:
(JSC::VM::VM):
* runtime/VM.h:

Source/WebCore:

No new tests required since no functionality changed.

* bindings/js/JSDOMWindowBase.cpp:
(WebCore::JSDOMWindowBase::commonVM):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@153331 268f45cc-cd09-0410-ab3c-d52691b4dbfc