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 453479c8ce684b202d19f90d1ff2e7c511924bf1..9a48c6cd17ed299f91cf77f01c2e5c84562385fb 100644
--- a/third_party/WebKit/Source/core/css/invalidation/StyleInvalidator.cpp
+++ b/third_party/WebKit/Source/core/css/invalidation/StyleInvalidator.cpp
@@ -165,12 +165,7 @@ 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;
             }