Attempt to fix the crash in blink Scroll Animator.

third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm

Index: third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm
diff --git a/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm b/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm
index 6f940cb75decad84a1bb1ab2c93ed210adf89f45..458ac7fe7add02c96d0958fb9ae442a040db1ae0 100644
--- a/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm
+++ b/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm
@@ -689,10 +689,6 @@ ScrollAnimatorMac::ScrollAnimatorMac(ScrollableArea* scrollableArea)
     , m_haveScrolledSincePageLoad(false)
     , m_needsScrollerStyleUpdate(false)
 {
-#if ENABLE(OILPAN)
-    ThreadState::current()->registerPreFinalizer(this);
-#endif
-
     m_scrollAnimationHelperDelegate.adoptNS([[BlinkScrollAnimationHelperDelegate alloc] initWithScrollAnimator:this]);
     m_scrollAnimationHelper.adoptNS([[NSClassFromString(@"NSScrollAnimationHelper") alloc] initWithDelegate:m_scrollAnimationHelperDelegate.get()]);
 
@@ -724,6 +720,7 @@ void ScrollAnimatorMac::dispose()
     }
     m_initialScrollbarPaintTimer.stop();
     m_sendContentAreaScrolledTimer.stop();
+    ScrollAnimatorCompositorCoordinator::dispose();
 }
 
 ScrollResultOneDimensional ScrollAnimatorMac::userScroll(ScrollbarOrientation orientation, ScrollGranularity granularity, float step, float delta)