Bug 1319278 P2 Make the WorkerPrivate create a WorkerControlEventTarget. r=baku

dom/workers/WorkerPrivate.cpp

@@ -4143,6 +4143,7 @@ WorkerPrivate::WorkerPrivate(WorkerPrivate* aParent,
   , mPRThread(nullptr)
   , mDebuggerEventLoopLevel(0)
   , mMainThreadEventTarget(do_GetMainThread())
+  , mWorkerControlEventTarget(new WorkerControlEventTarget(this))
   , mErrorHandlerRecursionCount(0)
   , mNextTimeoutId(1)
   , mStatus(Pending)
@@ -4209,6 +4210,7 @@ WorkerPrivate::WorkerPrivate(WorkerPrivate* aParent,
 
 WorkerPrivate::~WorkerPrivate()
 {
+  mWorkerControlEventTarget->ForgetWorkerPrivate(this);
 }
 
 // static

dom/workers/WorkerPrivate.h

@@ -937,6 +937,7 @@ class WorkerPrivate : public WorkerPrivateParent<WorkerPrivate>
   uint32_t mDebuggerEventLoopLevel;
   RefPtr<ThrottledEventQueue> mMainThreadThrottledEventQueue;
   nsCOMPtr<nsIEventTarget> mMainThreadEventTarget;
+  RefPtr<WorkerControlEventTarget> mWorkerControlEventTarget;
 
   struct SyncLoopInfo
   {