Cherry-pick r415013 to M53.

third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp

Index: third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp b/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
index 52b9388e24a8e3a1c000d9436060d890b878bdd8..43a3333ad048a78fc8b390937f87c4f4fb218b84 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp
@@ -1455,10 +1455,6 @@ void PaintLayerScrollableArea::updateCompositingLayersAfterScroll()
 
 bool PaintLayerScrollableArea::usesCompositedScrolling() const
 {
-    // Scroll form controls on the main thread so they exhibit correct touch scroll event bubbling
-    if (box().isIntrinsicallyScrollable(VerticalScrollbar) || box().isIntrinsicallyScrollable(HorizontalScrollbar))
-        return false;
-
     // See https://codereview.chromium.org/176633003/ for the tests that fail without this disabler.
     DisableCompositingQueryAsserts disabler;
     return layer()->hasCompositedLayerMapping() && layer()->compositedLayerMapping()->scrollingLayer();