Pass the v8::Context through the willDestroyServiceWorkerContextOnWorkerThread event.

Source/web/ServiceWorkerGlobalScopeProxy.cpp

Index: Source/web/ServiceWorkerGlobalScopeProxy.cpp
diff --git a/Source/web/ServiceWorkerGlobalScopeProxy.cpp b/Source/web/ServiceWorkerGlobalScopeProxy.cpp
index f48c98e9006739b2aba2ffb624b8e25aa95eb5e7..22363c329e752e69045d518602631a406d35650d 100644
--- a/Source/web/ServiceWorkerGlobalScopeProxy.cpp
+++ b/Source/web/ServiceWorkerGlobalScopeProxy.cpp
@@ -39,6 +39,7 @@
 #include "core/events/MessageEvent.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/workers/WorkerGlobalScope.h"
+#include "core/workers/WorkerThread.h"
 #include "modules/background_sync/SyncEvent.h"
 #include "modules/background_sync/SyncRegistration.h"
 #include "modules/fetch/Headers.h"
@@ -225,8 +226,9 @@ void ServiceWorkerGlobalScopeProxy::workerGlobalScopeClosed()
 
 void ServiceWorkerGlobalScopeProxy::willDestroyWorkerGlobalScope()
 {
+    v8::HandleScope handleScope(m_workerGlobalScope->thread()->isolate());
+    m_client.willDestroyWorkerContext(m_workerGlobalScope->script()->context());
     m_workerGlobalScope = nullptr;
-    m_client.willDestroyWorkerContext();
 }
 
 void ServiceWorkerGlobalScopeProxy::workerThreadTerminated()