Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/animation/KeyframeEffect.h

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 91 matching lines @@
     void attach(Animation*) override;
     void detach() override;
     void specifiedTimingChanged() override;
     double calculateTimeToEffectChange(bool forwards, double inheritedTime, double timeToNextIteration) const override;
     virtual bool hasIncompatibleStyle();
     bool hasMultipleTransformProperties() const;
 
 private:
     KeyframeEffect(Element*, EffectModel*, const Timing&, Priority, EventDelegate*);
 
-    RawPtrWillBeMember<Element> m_target;
+    Member<Element> m_target;
     Member<EffectModel> m_model;
     Member<SampledEffect> m_sampledEffect;
 
     Priority m_priority;
 
     Vector<int> m_compositorAnimationIds;
 
     friend class AnimationAnimationV8Test;
 };
 
 DEFINE_TYPE_CASTS(KeyframeEffect, AnimationEffect, animationNode, animationNode->isKeyframeEffect(), animationNode.isKeyframeEffect());
 
 } // namespace blink
 
 #endif // KeyframeEffect_h