[Oilpan] Move ScrollAnimators onto oilpan heap

third_party/WebKit/Source/platform/scroll/ScrollAnimator.cpp

Index: third_party/WebKit/Source/platform/scroll/ScrollAnimator.cpp
diff --git a/third_party/WebKit/Source/platform/scroll/ScrollAnimator.cpp b/third_party/WebKit/Source/platform/scroll/ScrollAnimator.cpp
index a01daa2ad01bbbd852ef45d151aa4978bf9bc0b1..a6dc9bffc3c47ebd627718a9fbf18deb93ab410c 100644
--- a/third_party/WebKit/Source/platform/scroll/ScrollAnimator.cpp
+++ b/third_party/WebKit/Source/platform/scroll/ScrollAnimator.cpp
@@ -41,11 +41,11 @@
 
 namespace blink {
 
-PassOwnPtr<ScrollAnimatorBase> ScrollAnimatorBase::create(ScrollableArea* scrollableArea)
+PassOwnPtrWillBeRawPtr<ScrollAnimatorBase> ScrollAnimatorBase::create(ScrollableArea* scrollableArea)
 {
     if (scrollableArea && scrollableArea->scrollAnimatorEnabled())
-        return adoptPtr(new ScrollAnimator(scrollableArea));
-    return adoptPtr(new ScrollAnimatorBase(scrollableArea));
+        return adoptPtrWillBeNoop(new ScrollAnimator(scrollableArea));
+    return adoptPtrWillBeNoop(new ScrollAnimatorBase(scrollableArea));
 }
 
 ScrollAnimator::ScrollAnimator(ScrollableArea* scrollableArea, WTF::TimeFunction timeFunction)
@@ -150,4 +150,9 @@ void ScrollAnimator::animationTimerFired()
     notifyPositionChanged();
 }
 
+DEFINE_TRACE(ScrollAnimator)
+{
+    ScrollAnimatorBase::trace(visitor);
+}
+
 } // namespace blink