Handle closed mode shadow for /deep/ and ::shadow selectors

Source/core/css/SelectorChecker.cpp

Index: Source/core/css/SelectorChecker.cpp
diff --git a/Source/core/css/SelectorChecker.cpp b/Source/core/css/SelectorChecker.cpp
index 45134f9de9d78959dbf1e6d710c414dcf91105de..eec09c769fcfc6cbd2b6a8c203fe069fd6357809 100644
--- a/Source/core/css/SelectorChecker.cpp
+++ b/Source/core/css/SelectorChecker.cpp
@@ -418,7 +418,7 @@ SelectorChecker::Match SelectorChecker::matchForRelation(const SelectorCheckingC
             if (!context.isUARule)
                 UseCounter::countDeprecation(context.element->document(), UseCounter::CSSDeepCombinator);
             if (ShadowRoot* root = context.element->containingShadowRoot()) {
-                if (root->type() == ShadowRootType::UserAgent)
+                if (!root->isOpen())
                     return SelectorFailsCompletely;
             }
 
@@ -433,6 +433,8 @@ SelectorChecker::Match SelectorChecker::matchForRelation(const SelectorCheckingC
             nextContext.isSubSelector = false;
             nextContext.inRightmostCompound = false;
             for (nextContext.element = context.element->parentOrShadowHostElement(); nextContext.element; nextContext.element = nextContext.element->parentOrShadowHostElement()) {
+                if (nextContext.element->closedShadowRoot())
+                    return SelectorFailsCompletely;
                 Match match = matchSelector(nextContext, result);
                 if (match == SelectorMatches || match == SelectorFailsCompletely)
                     return match;