Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/permissions/PermissionStatus.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 PermissionStatus_h
 #define PermissionStatus_h
 
 #include "core/dom/ActiveDOMObject.h"
 #include "core/events/EventTarget.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/modules/permissions/WebPermissionObserver.h"
 #include "public/platform/modules/permissions/WebPermissionStatus.h"
 #include "public/platform/modules/permissions/WebPermissionType.h"
 #include "wtf/text/AtomicString.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class ExecutionContext;
 class ScriptPromiseResolver;
 
 // Expose the status of a given WebPermissionType for the current
 // ExecutionContext.
 class PermissionStatus final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<PermissionStatus>
     , public ActiveDOMObject
     , public WebPermissionObserver {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(PermissionStatus);
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PermissionStatus);
+    USING_GARBAGE_COLLECTED_MIXIN(PermissionStatus);
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PermissionStatus* take(ScriptPromiseResolver*, WebPermissionStatus, WebPermissionType);
 
     static PermissionStatus* createAndListen(ExecutionContext*, WebPermissionStatus, WebPermissionType);
     ~PermissionStatus() override;
 
     // EventTarget implementation.
     const AtomicString& interfaceName() const override;
     ExecutionContext* executionContext() const override;
@@ skipping 20 matching lines @@
     void stopListening();
 
     WebPermissionStatus m_status;
     WebPermissionType m_type;
     bool m_listening;
 };
 
 } // namespace blink
 
 #endif // PermissionStatus_h