Don't be so CRASH happy in the bindings layer.

WebCore/bindings/js/WorkerScriptController.cpp

Index: WebCore/bindings/js/WorkerScriptController.cpp
===================================================================
--- WebCore/bindings/js/WorkerScriptController.cpp	(revision 109601)
+++ WebCore/bindings/js/WorkerScriptController.cpp	(working copy)
@@ -162,9 +162,16 @@
 
 void WorkerScriptController::scheduleExecutionTermination()
 {
+    MutexLocker locker(m_scheduledTerminationMutex);
     m_globalData->terminator.terminateSoon();
 }
 
+bool WorkerScriptController::isExecutionTerminating() const
+{
+    MutexLocker locker(m_scheduledTerminationMutex);
+    return m_globalData->terminator.shouldTerminate();
+}
+
 void WorkerScriptController::forbidExecution()
 {
     ASSERT(m_workerContext->isContextThread());