Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/serviceworkers/WaitUntilObserver.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WaitUntilObserver_h
 #define WaitUntilObserver_h
 
 #include "core/dom/ContextLifecycleObserver.h"
 #include "modules/ModulesExport.h"
 #include "modules/serviceworkers/ServiceWorkerGlobalScopeClient.h"
 #include "platform/Timer.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
 class ExceptionState;
 class ExecutionContext;
 class ScriptPromise;
 class ScriptState;
 class ScriptValue;
 
 // Created for each ExtendableEvent instance.
 class MODULES_EXPORT WaitUntilObserver final : public GarbageCollectedFinalized<WaitUntilObserver>, public ContextLifecycleObserver {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(WaitUntilObserver);
+    USING_GARBAGE_COLLECTED_MIXIN(WaitUntilObserver);
 public:
     enum EventType {
         Activate,
         Install,
         Message,
         NotificationClick,
         NotificationClose,
         Push,
         Sync
     };
@@ skipping 27 matching lines @@
     int m_eventID;
     int m_pendingActivity;
     bool m_hasError;
     bool m_eventDispatched;
     Timer<WaitUntilObserver> m_consumeWindowInteractionTimer;
 };
 
 } // namespace blink
 
 #endif // WaitUntilObserver_h