Fix sticky bottom is not applied with both sticky position

third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 984 matching lines @@
   LayoutUnit horizontalOffsets =
       minimumValueForLength(style()->right(),
                             LayoutUnit(constrainingSize.width())) +
       minimumValueForLength(style()->left(),
                             LayoutUnit(constrainingSize.width()));
   bool skipRight = false;
   bool skipLeft = false;
   if (!style()->left().isAuto() && !style()->right().isAuto()) {
     if (horizontalOffsets >
             scrollContainerRelativeContainingBlockRect.width() ||
-        horizontalOffsets + scrollContainerRelativeContainingBlockRect.width() >
-            constrainingSize.width()) {
+        horizontalOffsets + stickyBoxRect.width() > constrainingSize.width()) {
       skipRight = style()->isLeftToRightDirection();
       skipLeft = !skipRight;
     }
   }
 
   if (!style()->left().isAuto() && !skipLeft) {
     constraints.setLeftOffset(minimumValueForLength(
         style()->left(), LayoutUnit(constrainingSize.width())));
     constraints.addAnchorEdge(
         StickyPositionScrollingConstraints::AnchorEdgeLeft);
@@ skipping 10 matching lines @@
   // TODO(flackr): Exclude top or bottom edge offset depending on the writing
   // mode when related sections are fixed in spec.
   // See http://lists.w3.org/Archives/Public/www-style/2014May/0286.html
   LayoutUnit verticalOffsets =
       minimumValueForLength(style()->top(),
                             LayoutUnit(constrainingSize.height())) +
       minimumValueForLength(style()->bottom(),
                             LayoutUnit(constrainingSize.height()));
   if (!style()->top().isAuto() && !style()->bottom().isAuto()) {
     if (verticalOffsets > scrollContainerRelativeContainingBlockRect.height() ||
-        verticalOffsets + scrollContainerRelativeContainingBlockRect.height() >
-            constrainingSize.height()) {
+        verticalOffsets + stickyBoxRect.height() > constrainingSize.height()) {
       skipBottom = true;
     }
   }
 
   if (!style()->top().isAuto()) {
     constraints.setTopOffset(minimumValueForLength(
         style()->top(), LayoutUnit(constrainingSize.height())));
     constraints.addAnchorEdge(
         StickyPositionScrollingConstraints::AnchorEdgeTop);
   }
@@ skipping 419 matching lines @@
   if (rootElementStyle->hasBackground())
     return false;
 
   if (node() != document().firstBodyElement())
     return false;
 
   return true;
 }
 
 }  // namespace blink