Remove checkForChildrenAdjacentRuleChanges.

third_party/WebKit/Source/core/css/invalidation/StyleInvalidator.cpp

Index: third_party/WebKit/Source/core/css/invalidation/StyleInvalidator.cpp
diff --git a/third_party/WebKit/Source/core/css/invalidation/StyleInvalidator.cpp b/third_party/WebKit/Source/core/css/invalidation/StyleInvalidator.cpp
index db5fa17e453f15b34e8499e989ab087bbcc3568d..efb8080eef80275a4cc7af35d0ea265f4110a4d3 100644
--- a/third_party/WebKit/Source/core/css/invalidation/StyleInvalidator.cpp
+++ b/third_party/WebKit/Source/core/css/invalidation/StyleInvalidator.cpp
@@ -166,12 +166,7 @@ bool StyleInvalidator::SiblingData::matchCurrentInvalidationSets(Element& elemen
         if (invalidationSet.invalidatesElement(element)) {
             const DescendantInvalidationSet& descendants = invalidationSet.descendants();
             if (descendants.wholeSubtreeInvalid()) {
-                // Avoid directly setting SubtreeStyleChange on element, or ContainerNode::checkForChildrenAdjacentRuleChanges()
-                // may propagate the SubtreeStyleChange to our own siblings' subtrees.
-
-                for (Element* child = ElementTraversal::firstChild(element); child; child = ElementTraversal::nextSibling(*child)) {
-                    child->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::SiblingSelector));
-                }
+                element.setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::StyleInvalidator));
                 return true;
             }