Pass the v8::Context through the willDestroyServiceWorkerContextOnWorkerThread event.

Source/core/workers/WorkerThread.cpp

Index: Source/core/workers/WorkerThread.cpp
diff --git a/Source/core/workers/WorkerThread.cpp b/Source/core/workers/WorkerThread.cpp
index 08e537eb82451175466e3d61e8d4331d04c4ee86..e8c44a3c863da1942fe14243d6b8ba1f3218c482 100644
--- a/Source/core/workers/WorkerThread.cpp
+++ b/Source/core/workers/WorkerThread.cpp
@@ -274,11 +274,11 @@ void WorkerThread::shutdown()
         m_shutdown = true;
     }
 
-    workerGlobalScope()->dispose();
-
     // This should be called before we start the shutdown procedure.
     workerReportingProxy().willDestroyWorkerGlobalScope();
 
+    workerGlobalScope()->dispose();
+
     backingThread().removeTaskObserver(m_microtaskRunner.get());
     postTask(FROM_HERE, createSameThreadTask(&WorkerThread::performShutdownTask, this));
 }