Avoid resetting rule features when removing style-less shadow.

Source/core/css/resolver/StyleResolver.cpp

Index: Source/core/css/resolver/StyleResolver.cpp
diff --git a/Source/core/css/resolver/StyleResolver.cpp b/Source/core/css/resolver/StyleResolver.cpp
index 1c73f4e1b0e1fabc11be95cc75480c2f2d8feed0..5574120de126a787d69bc2f7bb711077a150b602 100644
--- a/Source/core/css/resolver/StyleResolver.cpp
+++ b/Source/core/css/resolver/StyleResolver.cpp
@@ -240,12 +240,13 @@ void StyleResolver::addTreeBoundaryCrossingScope(ContainerNode& scope)
 void StyleResolver::resetAuthorStyle(TreeScope& treeScope)
 {
     m_treeBoundaryCrossingRules.removeScope(treeScope.rootNode());
-    resetRuleFeatures();
 
     ScopedStyleResolver* resolver = treeScope.scopedStyleResolver();
     if (!resolver)
         return;
 
+    resetRuleFeatures();
+
     if (treeScope.rootNode().isDocumentNode()) {
         resolver->resetAuthorStyle();
         return;