Highlighting on UAOS - alternate approach

Source/core/page/scrolling/ScrollingCoordinator.cpp

Index: Source/core/page/scrolling/ScrollingCoordinator.cpp
diff --git a/Source/core/page/scrolling/ScrollingCoordinator.cpp b/Source/core/page/scrolling/ScrollingCoordinator.cpp
index 26291466a173e59bd53c3172d4fc6487e2d05445..9829891d2aea3bfe217076f41a075664e7df19dc 100644
--- a/Source/core/page/scrolling/ScrollingCoordinator.cpp
+++ b/Source/core/page/scrolling/ScrollingCoordinator.cpp
@@ -642,6 +642,11 @@ void ScrollingCoordinator::updateScrollParentForGraphicsLayer(GraphicsLayer* chi
     child->setScrollParent(scrollParentWebLayer);
 }
 
+bool ScrollingCoordinator::hasScrollChildren(GraphicsLayer* layer)
+{
+    return toWebLayer(layer)->hasScrollChildren();
+}
+
 void ScrollingCoordinator::updateClipParentForGraphicsLayer(GraphicsLayer* child, RenderLayer* parent)
 {
     WebLayer* clipParentWebLayer = 0;