Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/workers/WorkerMessagingProxy.h

Index: third_party/WebKit/Source/core/workers/WorkerMessagingProxy.h
diff --git a/third_party/WebKit/Source/core/workers/WorkerMessagingProxy.h b/third_party/WebKit/Source/core/workers/WorkerMessagingProxy.h
index 95d31d048ef2485a4493b5084d964c05c84e7763..92f831897a1e048230104e9068d2431ae8b76d08 100644
--- a/third_party/WebKit/Source/core/workers/WorkerMessagingProxy.h
+++ b/third_party/WebKit/Source/core/workers/WorkerMessagingProxy.h
@@ -78,7 +78,7 @@ public:
     ExecutionContext* executionContext() const { return m_executionContext.get(); }
 
 protected:
-    WorkerMessagingProxy(InProcessWorkerBase*, PassOwnPtrWillBeRawPtr<WorkerClients>);
+    WorkerMessagingProxy(InProcessWorkerBase*, RawPtr<WorkerClients>);
     ~WorkerMessagingProxy() override;
 
     virtual PassRefPtr<WorkerThread> createWorkerThread(double originTime) = 0;
@@ -96,7 +96,7 @@ private:
     void postTaskToLoader(PassOwnPtr<ExecutionContextTask>) override;
     bool postTaskToWorkerGlobalScope(PassOwnPtr<ExecutionContextTask>) override;
 
-    RefPtrWillBePersistent<ExecutionContext> m_executionContext;
+    Persistent<ExecutionContext> m_executionContext;
     OwnPtr<WorkerObjectProxy> m_workerObjectProxy;
     WeakPersistent<InProcessWorkerBase> m_workerObject;
     bool m_mayBeDestroyed;
@@ -108,9 +108,9 @@ private:
     bool m_askedToTerminate;
 
     Vector<OwnPtr<ExecutionContextTask>> m_queuedEarlyTasks; // Tasks are queued here until there's a thread object created.
-    OwnPtrWillBePersistent<WorkerInspectorProxy> m_workerInspectorProxy;
+    Persistent<WorkerInspectorProxy> m_workerInspectorProxy;
 
-    OwnPtrWillBePersistent<WorkerClients> m_workerClients;
+    Persistent<WorkerClients> m_workerClients;
 
     RefPtr<WorkerLoaderProxy> m_loaderProxy;
 };