Add offset contributed to sticky position box rect by location containers

third_party/WebKit/Source/core/layout/LayoutObject.h

Index: third_party/WebKit/Source/core/layout/LayoutObject.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.h b/third_party/WebKit/Source/core/layout/LayoutObject.h
index 785c2dfe6eb543fff71c48a62403d488505d505c..7545f42d0a7281605d6882f350496e1e48100f48 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.h
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.h
@@ -1226,6 +1226,13 @@ class CORE_EXPORT LayoutObject : public ImageResourceObserver,
                             const LayoutPoint& preOffset,
                             const LayoutPoint& postOffset) const;
 
+  // Convert a local quad into the coordinate system of container, not
+  // include transforms. See localToAncestorQuad for details.
+  FloatQuad localToAncestorQuadWithoutTransforms(
+      const FloatQuad&,
+      const LayoutBoxModelObject* ancestor,
+      MapCoordinatesFlags = 0) const;
+
   // Return the transformation matrix to map points from local to the coordinate
   // system of a container, taking transforms into account.
   // Passing null for |ancestor| behaves the same as localToAncestorQuad.