[Oilpan] Move ScrollAnimators onto oilpan heap

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

Index: third_party/WebKit/Source/platform/scroll/ScrollableArea.cpp
diff --git a/third_party/WebKit/Source/platform/scroll/ScrollableArea.cpp b/third_party/WebKit/Source/platform/scroll/ScrollableArea.cpp
index 85016be74b5a15c2f326a65e4254a439ceac12f6..ef9ebcdde1510abf631006b8f8cfaa2c135e7f88 100644
--- a/third_party/WebKit/Source/platform/scroll/ScrollableArea.cpp
+++ b/third_party/WebKit/Source/platform/scroll/ScrollableArea.cpp
@@ -54,6 +54,7 @@ struct SameSizeAsScrollableArea {
 #if ENABLE(ASSERT) && ENABLE(OILPAN)
     VerifyEagerFinalization verifyEager;
 #endif
+    PersistentWillBeMember<void*> persistent;
     void* pointer;
     unsigned bitfields : 16;
     IntPoint origin;
@@ -93,29 +94,24 @@ ScrollableArea::~ScrollableArea()
 
 void ScrollableArea::clearScrollAnimators()
 {
-    m_animators.clear();
+    m_scrollAnimator.clear();
+    m_programmaticScrollAnimator.clear();
 }
 
 ScrollAnimatorBase* ScrollableArea::scrollAnimator() const
 {
-    if (!m_animators)
-        m_animators = adoptPtr(new ScrollableAreaAnimators);
+    if (!m_scrollAnimator)
+        m_scrollAnimator = ScrollAnimatorBase::create(const_cast<ScrollableArea*>(this));
 
-    if (!m_animators->scrollAnimator)
-        m_animators->scrollAnimator = ScrollAnimatorBase::create(const_cast<ScrollableArea*>(this));
-
-    return m_animators->scrollAnimator.get();
+    return m_scrollAnimator.get();
 }
 
 ProgrammaticScrollAnimator* ScrollableArea::programmaticScrollAnimator() const
 {
-    if (!m_animators)
-        m_animators = adoptPtr(new ScrollableAreaAnimators);
-
-    if (!m_animators->programmaticScrollAnimator)
-        m_animators->programmaticScrollAnimator = ProgrammaticScrollAnimator::create(const_cast<ScrollableArea*>(this));
+    if (!m_programmaticScrollAnimator)
+        m_programmaticScrollAnimator = ProgrammaticScrollAnimator::create(const_cast<ScrollableArea*>(this));
 
-    return m_animators->programmaticScrollAnimator.get();
+    return m_programmaticScrollAnimator.get();
 }
 
 void ScrollableArea::setScrollOrigin(const IntPoint& origin)
@@ -584,4 +580,10 @@ IntSize ScrollableArea::excludeScrollbars(const IntSize& size) const
 
 }
 
+DEFINE_TRACE(ScrollableArea)
+{
+    visitor->trace(m_scrollAnimator);
+    visitor->trace(m_programmaticScrollAnimator);
+}
+
 } // namespace blink