Avoid style sharing with mis-matched descendant selectors

Source/core/css/resolver/ScopedStyleResolver.cpp

Index: Source/core/css/resolver/ScopedStyleResolver.cpp
diff --git a/Source/core/css/resolver/ScopedStyleResolver.cpp b/Source/core/css/resolver/ScopedStyleResolver.cpp
index 3bc70ed09d42c1ab762c5ffee02fab9c954cb112..6e736f183eb51cff64d264fbe93e08e8f35ff653 100644
--- a/Source/core/css/resolver/ScopedStyleResolver.cpp
+++ b/Source/core/css/resolver/ScopedStyleResolver.cpp
@@ -396,6 +396,14 @@ void ScopedStyleResolver::matchAuthorRules(ElementRuleCollector& collector, bool
     collector.sortAndTransferMatchedRules();
 }
 
+bool ScopedStyleResolver::matchesAnyAuthorRules(ElementRuleCollector& collector, bool includeEmptyRules, bool applyAuthorStyles)
+{
+    collector.clearMatchedRules();
+    collector.matchedResult().ranges.lastAuthorRule = collector.matchedResult().matchedProperties.size() - 1;
+    collectMatchingAuthorRules(collector, includeEmptyRules, applyAuthorStyles, ignoreCascadeScope);
+    return collector.matchedResult().matchedRules.size();
+}
+
 void ScopedStyleResolver::collectMatchingAuthorRules(ElementRuleCollector& collector, bool includeEmptyRules, bool applyAuthorStyles, CascadeScope cascadeScope, CascadeOrder cascadeOrder)
 {
     if (!m_authorStyle)