Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/animation/Animation.cpp

Index: third_party/WebKit/Source/core/animation/Animation.cpp
diff --git a/third_party/WebKit/Source/core/animation/Animation.cpp b/third_party/WebKit/Source/core/animation/Animation.cpp
index fe128ab5681b93f8fc0b986307c055b02a18661b..79203aa481a72b1db300b9ae8a08d940a5d6e4bb 100644
--- a/third_party/WebKit/Source/core/animation/Animation.cpp
+++ b/third_party/WebKit/Source/core/animation/Animation.cpp
@@ -640,7 +640,7 @@ void Animation::stop()
     m_pendingFinishedEvent = nullptr;
 }
 
-bool Animation::dispatchEventInternal(PassRefPtrWillBeRawPtr<Event> event)
+bool Animation::dispatchEventInternal(RawPtr<Event> event)
 {
     if (m_pendingFinishedEvent == event)
         m_pendingFinishedEvent = nullptr;
@@ -1067,7 +1067,7 @@ Animation::PlayStateUpdateScope::~PlayStateUpdateScope()
         InspectorInstrumentation::animationPlayStateChanged(m_animation->timeline()->document(), m_animation, oldPlayState, newPlayState);
 }
 
-bool Animation::addEventListenerInternal(const AtomicString& eventType, PassRefPtrWillBeRawPtr<EventListener> listener, const EventListenerOptions& options)
+bool Animation::addEventListenerInternal(const AtomicString& eventType, RawPtr<EventListener> listener, const EventListenerOptions& options)
 {
     if (eventType == EventTypeNames::finish)
         UseCounter::count(executionContext(), UseCounter::AnimationFinishEvent);