Clean compositing inputs for location APIs for sticky-affected elements.

third_party/WebKit/Source/core/style/StyleRareInheritedData.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 203 matching lines @@
   unsigned ruby_position_ : 1;            // RubyPosition
 
   // Though will-change is not itself an inherited property, the intent
   // expressed by 'will-change: contents' includes descendants.
   unsigned subtree_will_change_contents_ : 1;
 
   unsigned self_or_ancestor_has_dir_auto_attribute_ : 1;
 
   unsigned respect_image_orientation_ : 1;
 
+  // Though position: sticky is not itself an inherited property, being a
+  // descendent of a sticky element changes some document lifecycle logic.
+  unsigned subtree_is_sticky_ : 1;
+
   AtomicString hyphenation_string_;
   short hyphenation_limit_before_;
   short hyphenation_limit_after_;
   short hyphenation_limit_lines_;
 
   uint8_t line_height_step_;
 
   AtomicString text_emphasis_custom_mark_;
   RefPtr<QuotesData> quotes_;
 
   Color tap_highlight_color_;
 
   RefPtr<AppliedTextDecorationList> applied_text_decorations_;
   TabSize tab_size_;
 
   RefPtr<StyleInheritedVariables> variables_;
   TextSizeAdjust text_size_adjust_;
 
  private:
   StyleRareInheritedData();
   StyleRareInheritedData(const StyleRareInheritedData&);
 };
 
 }  // namespace blink
 
 #endif  // StyleRareInheritedData_h