Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h

Index: third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h
diff --git a/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h b/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h
index 78a46de3d3d88cc7a9cf2d1de609736978b457a9..bf7fda4c35bfbcdbf9cc2c97496e5cf410b2c2b0 100644
--- a/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h
+++ b/third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.h
@@ -107,15 +107,15 @@ private:
 
     RefPtr<WorkerThread> m_workerThread;
     RefPtr<WorkerLoaderProxy> m_loaderProxy;
-    OwnPtrWillBePersistent<ServiceWorkerGlobalScopeProxy> m_workerGlobalScopeProxy;
-    OwnPtrWillBePersistent<WorkerInspectorProxy> m_workerInspectorProxy;
+    Persistent<ServiceWorkerGlobalScopeProxy> m_workerGlobalScopeProxy;
+    Persistent<WorkerInspectorProxy> m_workerInspectorProxy;
 
     // 'shadow page' - created to proxy loading requests from the worker.
     // Both WebView and WebFrame objects are close()'ed (where they're
     // deref'ed) when this EmbeddedWorkerImpl is destructed, therefore they
     // are guaranteed to exist while this object is around.
     WebView* m_webView;
-    RefPtrWillBePersistent<WebLocalFrameImpl> m_mainFrame;
+    Persistent<WebLocalFrameImpl> m_mainFrame;
 
     bool m_loadingShadowPage;
     bool m_askedToTerminate;