Enable Scroll Animation for RenderLayerScrollableArea

Source/core/rendering/RenderLayerScrollableArea.cpp

Index: Source/core/rendering/RenderLayerScrollableArea.cpp
diff --git a/Source/core/rendering/RenderLayerScrollableArea.cpp b/Source/core/rendering/RenderLayerScrollableArea.cpp
index a93e4f9d94866456285f0f7d108eb5fc933b4b53..9fd660cb56f0e1eb08dd8ffd8fdb54e6be290bed 100644
--- a/Source/core/rendering/RenderLayerScrollableArea.cpp
+++ b/Source/core/rendering/RenderLayerScrollableArea.cpp
@@ -49,6 +49,7 @@
 #include "core/editing/FrameSelection.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
+#include "core/frame/Settings.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/page/EventHandler.h"
@@ -476,6 +477,20 @@ IntPoint RenderLayerScrollableArea::lastKnownMousePosition() const
     return m_box->frame() ? m_box->frame()->eventHandler().lastKnownMousePosition() : IntPoint();
 }
 
+bool RenderLayerScrollableArea::scrollAnimatorEnabled() const
+{
+    return m_box->frame()->settings() && m_box->frame()->settings()->scrollAnimatorEnabled();
+}
+
+bool RenderLayerScrollableArea::scheduleAnimation()
+{
+    if (HostWindow* window = m_box->frameView()->hostWindow()) {
+        window->scheduleAnimation();
+        return true;
+    }
+    return false;
+}
+
 bool RenderLayerScrollableArea::shouldSuspendScrollAnimations() const
 {
     RenderView* view = m_box->view();