Remove AnimationTimeline pre-finalizer

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

Index: third_party/WebKit/Source/core/animation/AnimationTimeline.cpp
diff --git a/third_party/WebKit/Source/core/animation/AnimationTimeline.cpp b/third_party/WebKit/Source/core/animation/AnimationTimeline.cpp
index 99b35e68c0b3892259cf7147c11cd1164876cb9d..5dd9db09643392edb350e5e50c891306eb597452 100644
--- a/third_party/WebKit/Source/core/animation/AnimationTimeline.cpp
+++ b/third_party/WebKit/Source/core/animation/AnimationTimeline.cpp
@@ -73,7 +73,6 @@ AnimationTimeline::AnimationTimeline(Document* document, PlatformTiming* timing)
     , m_playbackRate(1)
     , m_lastCurrentTimeInternal(0)
 {
-    ThreadState::current()->registerPreFinalizer(this);
     if (!timing)
         m_timing = new AnimationTimelineTiming(this);
     else
@@ -85,21 +84,6 @@ AnimationTimeline::AnimationTimeline(Document* document, PlatformTiming* timing)
     ASSERT(document);
 }
 
-AnimationTimeline::~AnimationTimeline()
-{
-}
-
-void AnimationTimeline::dispose()
-{
-    // The Animation objects depend on using this AnimationTimeline to
-    // unregister from its underlying compositor timeline. To arrange
-    // for that safely, this dispose() method will return first
-    // during prefinalization, notifying each Animation object of
-    // impending destruction.
-    for (const auto& animation : m_animations)
-        animation->dispose();
-}
-
 bool AnimationTimeline::isActive()
 {
     return m_document && m_document->page();