Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/mediastream/MediaDevicesRequest.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 24 matching lines @@
 
 namespace blink {
 
 class Document;
 class ExceptionState;
 class UserMediaController;
 class ScriptState;
 class ScriptPromiseResolver;
 
 class MODULES_EXPORT MediaDevicesRequest final : public GarbageCollectedFinalized<MediaDevicesRequest>, public ActiveDOMObject {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaDevicesRequest);
+    USING_GARBAGE_COLLECTED_MIXIN(MediaDevicesRequest);
 public:
     static MediaDevicesRequest* create(ScriptState*, UserMediaController*);
     ~MediaDevicesRequest() override;
 
     Document* ownerDocument();
 
     ScriptPromise start();
 
     void succeed(const MediaDeviceInfoVector&);
 
     // ActiveDOMObject
     void stop() override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     MediaDevicesRequest(ScriptState*, UserMediaController*);
 
-    RawPtrWillBeMember<UserMediaController> m_controller;
+    Member<UserMediaController> m_controller;
     Member<ScriptPromiseResolver> m_resolver;
 };
 
 } // namespace blink
 
 #endif // MediaDevicesRequest_h