Remove checkForChildrenAdjacentRuleChanges.

third_party/WebKit/Source/core/dom/ContainerNode.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2013 Apple 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 1287 matching lines @@
     ASSERT(isElementNode() || isShadowRoot());
     ensureRareData().setRestyleFlag(mask);
 }
 
 void ContainerNode::recalcChildStyle(StyleRecalcChange change)
 {
     ASSERT(document().inStyleRecalc());
     ASSERT(change >= UpdatePseudoElements || childNeedsStyleRecalc());
     ASSERT(!needsStyleRecalc());
 
-    if (change < Force && hasRareData() && childNeedsStyleRecalc())
-        checkForChildrenAdjacentRuleChanges();
-
     // This loop is deliberately backwards because we use insertBefore in the layout tree, and want to avoid
     // a potentially n^2 loop to find the insertion point while resolving style. Having us start from the last
     // child and work our way back means in the common case, we'll find the insertion point in O(1) time.
     // See crbug.com/288225
     StyleResolver& styleResolver = document().ensureStyleResolver();
     Text* lastTextNode = nullptr;
     for (Node* child = lastChild(); child; child = child->previousSibling()) {
         if (child->isTextNode()) {
             toText(child)->recalcTextStyle(change, lastTextNode);
             lastTextNode = toText(child);
         } else if (child->isElementNode()) {
             Element* element = toElement(child);
             if (element->shouldCallRecalcStyle(change))
                 element->recalcStyle(change, lastTextNode);
             else if (element->supportsStyleSharing())
                 styleResolver.addToStyleSharingList(*element);
             if (element->layoutObject())
                 lastTextNode = nullptr;
         }
     }
 }
 
-void ContainerNode::checkForChildrenAdjacentRuleChanges()
-{
-    bool hasDirectAdjacentRules = childrenAffectedByDirectAdjacentRules();
-    bool hasIndirectAdjacentRules = childrenAffectedByIndirectAdjacentRules();
-
-    if (!hasDirectAdjacentRules && !hasIndirectAdjacentRules)
-        return;
-
-    unsigned forceCheckOfNextElementCount = 0;
-    bool forceCheckOfAnyElementSibling = false;
-    Document& document = this->document();
-
-    for (Element* child = ElementTraversal::firstChild(*this); child; child = ElementTraversal::nextSibling(*child)) {
-        bool childRulesChanged = child->needsStyleRecalc() && child->styleChangeType() >= SubtreeStyleChange;
-
-        if (forceCheckOfNextElementCount || forceCheckOfAnyElementSibling)
-            child->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::SiblingSelector));
-
-        if (childRulesChanged && hasDirectAdjacentRules)
-            forceCheckOfNextElementCount = document.styleEngine().maxDirectAdjacentSelectors();
-        else if (forceCheckOfNextElementCount)
-            --forceCheckOfNextElementCount;
-
-        forceCheckOfAnyElementSibling = forceCheckOfAnyElementSibling || (childRulesChanged && hasIndirectAdjacentRules);
-    }
-}
-
 void ContainerNode::checkForSiblingStyleChanges(SiblingCheckType changeType, Node* nodeBeforeChange, Node* nodeAfterChange)
 {
     if (!inActiveDocument() || document().hasPendingForcedStyleRecalc() || styleChangeType() >= SubtreeStyleChange)
         return;
 
     // Forward positional selectors include nth-child, nth-of-type, first-of-type and only-of-type.
     // The indirect adjacent selector is the ~ selector.
     // Backward positional selectors include nth-last-child, nth-last-of-type, last-of-type and only-of-type.
     // We have to invalidate everything following the insertion point in the forward and indirect adjacent case,
     // and everything before the insertion point in the backward case.
@@ skipping 45 matching lines @@
 
         // This is the last child element removal case. The parser callback case is similar to node removal as well in that we need to change the last child
         // to match now.
         if ((changeType == SiblingElementRemoved || changeType == FinishedParsingChildren) && lastChildElement == elementBeforeChange && lastChildElement && lastChildElement->affectedByLastChildRules())
             lastChildElement->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::SiblingSelector));
     }
 
     // The + selector. We need to invalidate the first element following the change. It is the only possible element
     // that could be affected by this DOM change.
     if (childrenAffectedByDirectAdjacentRules() && nodeAfterChange) {
-        if (Element* elementAfterChange = nodeAfterChange->isElementNode() ? toElement(nodeAfterChange) : ElementTraversal::nextSibling(*nodeAfterChange))
+        Element* elementAfterChange = nodeAfterChange->isElementNode() ? toElement(nodeAfterChange) : ElementTraversal::nextSibling(*nodeAfterChange);
+        for (unsigned i = document().styleEngine().maxDirectAdjacentSelectors(); i && elementAfterChange; --i, elementAfterChange = ElementTraversal::nextSibling(*elementAfterChange))
             elementAfterChange->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::SiblingSelector));
     }
 }
 
 void ContainerNode::invalidateNodeListCachesInAncestors(const QualifiedName* attrName, Element* attributeOwnerElement)
 {
     if (hasRareData() && (!attrName || isAttributeNode())) {
         if (NodeListsNodeData* lists = rareData()->nodeLists()) {
             if (ChildNodeList* childNodeList = lists->childNodeList(*this))
                 childNodeList->invalidateCache();
@@ skipping 92 matching lines @@
         return true;
 
     if (node->isElementNode() && toElement(node)->shadow())
         return true;
 
     return false;
 }
 #endif
 
 } // namespace blink