WIP - improve ScrollableArea handling.

Source/platform/scroll/ScrollableArea.cpp

Index: Source/platform/scroll/ScrollableArea.cpp
diff --git a/Source/platform/scroll/ScrollableArea.cpp b/Source/platform/scroll/ScrollableArea.cpp
index c2be447d7866ccdfa7958e8267401010f25c37ca..f4e59a6d9842ba96675f15b0d57cb73c710997a0 100644
--- a/Source/platform/scroll/ScrollableArea.cpp
+++ b/Source/platform/scroll/ScrollableArea.cpp
@@ -52,6 +52,9 @@ namespace blink {
 struct SameSizeAsScrollableArea {
     virtual ~SameSizeAsScrollableArea();
     IntRect scrollbarDamage[2];
+#if ENABLE(ASSERT) && ENABLE(OILPAN)
+    VerifyEagerFinalization verifyEager;
+#endif
     void* pointer;
     unsigned bitfields : 16;
     IntPoint origin;
@@ -86,6 +89,11 @@ ScrollableArea::~ScrollableArea()
 {
 }
 
+void ScrollableArea::clearScrollAnimators()
+{
+    m_animators.clear();
+}
+
 ScrollAnimator* ScrollableArea::scrollAnimator() const
 {
     if (!m_animators)