Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/html/MediaKeyEvent.h

Index: third_party/WebKit/Source/core/html/MediaKeyEvent.h
diff --git a/third_party/WebKit/Source/core/html/MediaKeyEvent.h b/third_party/WebKit/Source/core/html/MediaKeyEvent.h
index 37bfacb6a9c9792847dc2a762dc1d6f615133ba1..7b74ccfa0c368ffbd06dfc90c9b5729a1f7fb5d2 100644
--- a/third_party/WebKit/Source/core/html/MediaKeyEvent.h
+++ b/third_party/WebKit/Source/core/html/MediaKeyEvent.h
@@ -39,14 +39,14 @@ class CORE_EXPORT MediaKeyEvent final : public Event {
 public:
     ~MediaKeyEvent() override;
 
-    static PassRefPtrWillBeRawPtr<MediaKeyEvent> create()
+    static RawPtr<MediaKeyEvent> create()
     {
-        return adoptRefWillBeNoop(new MediaKeyEvent);
+        return (new MediaKeyEvent);
     }
 
-    static PassRefPtrWillBeRawPtr<MediaKeyEvent> create(const AtomicString& type, const MediaKeyEventInit& initializer)
+    static RawPtr<MediaKeyEvent> create(const AtomicString& type, const MediaKeyEventInit& initializer)
     {
-        return adoptRefWillBeNoop(new MediaKeyEvent(type, initializer));
+        return (new MediaKeyEvent(type, initializer));
     }
 
     const AtomicString& interfaceName() const override;
@@ -70,7 +70,7 @@ private:
     RefPtr<DOMUint8Array> m_initData;
     RefPtr<DOMUint8Array> m_message;
     String m_defaultURL;
-    PersistentWillBeMember<MediaKeyError> m_errorCode;
+    Member<MediaKeyError> m_errorCode;
     unsigned short m_systemCode;
 };