Fix sticky constraints and update sticky layer positions recursively after scroll.

third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef StickyPositionScrollingConstraints_h
 #define StickyPositionScrollingConstraints_h
 
 #include "platform/geometry/FloatRect.h"
 
 namespace blink {
@@ skipping 37 matching lines @@
     float rightOffset() const { return m_rightOffset; }
     float topOffset() const { return m_topOffset; }
     float bottomOffset() const { return m_bottomOffset; }
 
     void setLeftOffset(float offset) { m_leftOffset = offset; }
     void setRightOffset(float offset) { m_rightOffset = offset; }
     void setTopOffset(float offset) { m_topOffset = offset; }
     void setBottomOffset(float offset) { m_bottomOffset = offset; }
 
     void setScrollContainerRelativeContainingBlockRect(const FloatRect& rect) { m_scrollContainerRelativeContainingBlockRect = rect; }
+    const FloatRect& scrollContainerRelativeContainingBlockRect() const { return m_scrollContainerRelativeContainingBlockRect; }

[chrishtr, 2016/06/16 11:03:59]

These new methods are only used in tests. Make them private and add the test as
a friend?

[flackr, 2016/06/29 13:21:06]

Done.

 
     void setScrollContainerRelativeStickyBoxRect(const FloatRect& rect) { m_scrollContainerRelativeStickyBoxRect = rect; }
+    const FloatRect& scrollContainerRelativeStickyBoxRect() const { return m_scrollContainerRelativeStickyBoxRect; }
 
     bool operator==(const StickyPositionScrollingConstraints& other) const
     {
         return m_leftOffset == other.m_leftOffset
             && m_rightOffset == other.m_rightOffset
             && m_topOffset == other.m_topOffset
             && m_bottomOffset == other.m_bottomOffset
             && m_scrollContainerRelativeContainingBlockRect == other.m_scrollContainerRelativeContainingBlockRect
             && m_scrollContainerRelativeStickyBoxRect == other.m_scrollContainerRelativeStickyBoxRect;
     }
 
     bool operator!=(const StickyPositionScrollingConstraints& other) const { return !(*this == other); }
 
 private:
     AnchorEdges m_anchorEdges;
     float m_leftOffset;
     float m_rightOffset;
     float m_topOffset;
     float m_bottomOffset;
     FloatRect m_scrollContainerRelativeContainingBlockRect;
     FloatRect m_scrollContainerRelativeStickyBoxRect;
 };
 
 } // namespace blink
 
 #endif // StickyPositionScrollingConstraints_h