Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/animation/css/CSSAnimations.h

Index: third_party/WebKit/Source/core/animation/css/CSSAnimations.h
diff --git a/third_party/WebKit/Source/core/animation/css/CSSAnimations.h b/third_party/WebKit/Source/core/animation/css/CSSAnimations.h
index 7529699fb45f21b672d05f08224b4c14b52ca5f0..07113dc360cca02b39c74a687764298922963b78 100644
--- a/third_party/WebKit/Source/core/animation/css/CSSAnimations.h
+++ b/third_party/WebKit/Source/core/animation/css/CSSAnimations.h
@@ -109,7 +109,7 @@ private:
         AtomicString name;
         size_t nameIndex;
         Timing specifiedTiming;
-        RefPtrWillBeMember<StyleRuleKeyframes> styleRule;
+        Member<StyleRuleKeyframes> styleRule;
         unsigned styleRuleVersion;
     };
 
@@ -162,7 +162,7 @@ private:
         Document& document() const { return m_animationTarget->document(); }
 
         void maybeDispatch(Document::ListenerType, const AtomicString& eventName, double elapsedTime);
-        RawPtrWillBeMember<Element> m_animationTarget;
+        Member<Element> m_animationTarget;
         const AtomicString m_name;
         AnimationEffect::Phase m_previousPhase;
         double m_previousIteration;
@@ -186,7 +186,7 @@ private:
         PseudoId pseudoId() const { return m_transitionTarget->pseudoId(); }
         Document& document() const { return m_transitionTarget->document(); }
 
-        RawPtrWillBeMember<Element> m_transitionTarget;
+        Member<Element> m_transitionTarget;
         const CSSPropertyID m_property;
         AnimationEffect::Phase m_previousPhase;
     };