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..e439e4743b447c03fa756386632d0b13bd6dfa05 100644
--- a/Source/core/css/SelectorChecker.cpp
+++ b/Source/core/css/SelectorChecker.cpp
@@ -432,12 +432,23 @@ 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()) {
+
+            Element* element = context.element;
+            while (true) {
+                if (element->parentNode() && element->parentNode()->isShadowRoot()) {
+                    if (!toShadowRoot(element->parentNode())->isOpen())
+                        break;
+                }
+                element = element->parentOrShadowHostElement();
+                if (!element)
+                    break;
+
+                nextContext.element = element;
                 Match match = matchSelector(nextContext, result);
                 if (match == SelectorMatches || match == SelectorFailsCompletely)
                     return match;
                 if (nextSelectorExceedsScope(nextContext))
-                    return SelectorFailsCompletely;
+                    break;
             }
             return SelectorFailsCompletely;
         }