Enable Scroll Animation for RenderLayerScrollableArea

Source/core/page/PageAnimator.cpp

Index: Source/core/page/PageAnimator.cpp
diff --git a/Source/core/page/PageAnimator.cpp b/Source/core/page/PageAnimator.cpp
index 33b2d8365e336c68681c12392a40b464b532858b..2ab467b592559b24680d1ad5781078fa46af4657 100644
--- a/Source/core/page/PageAnimator.cpp
+++ b/Source/core/page/PageAnimator.cpp
@@ -29,16 +29,26 @@ void PageAnimator::serviceScriptedAnimations(double monotonicAnimationStartTime)
     m_animationFramePending = false;
     TemporaryChange<bool> servicing(m_servicingAnimations, true);
 
-    for (RefPtr<LocalFrame> frame = m_page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
-        frame->view()->serviceScrollAnimations();
-        DocumentAnimations::updateAnimationTimingForAnimationFrame(*frame->document(), monotonicAnimationStartTime);
-        SVGDocumentExtensions::serviceOnAnimationFrame(*frame->document(), monotonicAnimationStartTime);
-    }
-
     Vector<RefPtr<Document> > documents;
-    for (LocalFrame* frame = m_page->mainFrame(); frame; frame = frame->tree().traverseNext())
+    for (RefPtr<LocalFrame> frame = m_page->mainFrame(); frame; frame = frame->tree().traverseNext())
         documents.append(frame->document());
 
+    for (size_t i = 0; i < documents.size(); ++i) {
+        if (documents[i]->frame()) {
+            documents[i]->view()->serviceScrollAnimations();
+
+            if (const FrameView::ScrollableAreaSet* scrollableAreas = documents[i]->view()->scrollableAreas()) {
+                for (FrameView::ScrollableAreaSet::iterator it = scrollableAreas->begin(); it != scrollableAreas->end(); ++it)
+                    (*it)->serviceScrollAnimations();
+            }
+        }
+    }
+
+    for (size_t i = 0; i < documents.size(); ++i) {
+        DocumentAnimations::updateAnimationTimingForAnimationFrame(*documents[i], monotonicAnimationStartTime);
+        SVGDocumentExtensions::serviceOnAnimationFrame(*documents[i], monotonicAnimationStartTime);
+    }
+
     for (size_t i = 0; i < documents.size(); ++i)
         documents[i]->serviceScriptedAnimations(monotonicAnimationStartTime);