*** NOT FOR LANDING *** Avoid localToContainerPoint() in DeprecatedPaintLayerClipper::addClipsFromT…

Source/core/paint/DeprecatedPaintLayerClipper.cpp

Index: Source/core/paint/DeprecatedPaintLayerClipper.cpp
diff --git a/Source/core/paint/DeprecatedPaintLayerClipper.cpp b/Source/core/paint/DeprecatedPaintLayerClipper.cpp
index 3b2be6a93e110d5f8d69da2d76b899776b772312..ccf6a1a36cc2230f7184d63848ea246735ae2dc9 100644
--- a/Source/core/paint/DeprecatedPaintLayerClipper.cpp
+++ b/Source/core/paint/DeprecatedPaintLayerClipper.cpp
@@ -276,10 +276,15 @@ void DeprecatedPaintLayerClipper::addClipsFromThisObject(const ClipRectsContext&
 {
     LayoutView* view = m_layoutObject.view();
     ASSERT(view);
+#if 1
+    LayoutPoint offset;
+    m_layoutObject.layer()->convertToLayerCoords(context.rootLayer, offset);
+#else
     // This offset cannot use convertToLayerCoords, because sometimes our rootLayer may be across
     // some transformed layer boundary, for example, in the DeprecatedPaintLayerCompositor overlapMap, where
     // clipRects are needed in view space.
-    LayoutPoint offset = roundedLayoutPoint(m_layoutObject.localToContainerPoint(FloatPoint(), context.rootLayer->layoutObject()));
+    LayoutPoint offset = roundedLayoutPoint(m_layoutObject.localToContainerPoint(FloatPoint(), context.rootLayer->layoutObject())); //
+#endif
     if (clipRects.fixed() && context.rootLayer->layoutObject() == view)
         offset -= toIntSize(view->frameView()->scrollPosition());