Recalc sibling styles for forward positional rules on mutations only.

Source/core/dom/shadow/ShadowRoot.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 111 matching lines @@
     PassRefPtr<Node> cloneNode(ExceptionState& exceptionState) { return cloneNode(true, exceptionState); }
 
     StyleSheetList* styleSheets();
     bool isActiveForStyling() const;
 
     bool childrenSupportStyleSharing() const;
     bool childrenAffectedByPositionalRules() const;
     bool childrenAffectedByFirstChildRules() const;
     bool childrenAffectedByLastChildRules() const;
     bool childrenAffectedByDirectAdjacentRules() const;
+    bool childrenAffectedByIndirectAdjacentRules() const;
     bool childrenAffectedByForwardPositionalRules() const;
     bool childrenAffectedByBackwardPositionalRules() const;
 
     void setChildrenAffectedByFirstChildRules();
     void setChildrenAffectedByLastChildRules();
     void setChildrenAffectedByDirectAdjacentRules();
+    void setChildrenAffectedByIndirectAdjacentRules();
     void setChildrenAffectedByForwardPositionalRules();
     void setChildrenAffectedByBackwardPositionalRules();
 
     using Node::isFinishedParsingChildren; // make public for SelectorChecker
 
 private:
     ShadowRoot(Document&, ShadowRootType);
     virtual ~ShadowRoot();
 
     virtual void dispose() OVERRIDE;
@@ skipping 25 matching lines @@
 {
     return adjustedFocusedElement();
 }
 
 DEFINE_NODE_TYPE_CASTS(ShadowRoot, isShadowRoot());
 DEFINE_TYPE_CASTS(ShadowRoot, TreeScope, treeScope, treeScope->rootNode().isShadowRoot(), treeScope.rootNode().isShadowRoot());
 
 } // namespace
 
 #endif