Index: third_party/WebKit/Source/core/dom/Element.cpp |
diff --git a/third_party/WebKit/Source/core/dom/Element.cpp b/third_party/WebKit/Source/core/dom/Element.cpp |
index 5a811b2ddd4d14c8c46e4e5adbfe5ca99e2fa5c9..d60418fc0621c83708f1cb70e3a579755d2d42e8 100644 |
--- a/third_party/WebKit/Source/core/dom/Element.cpp |
+++ b/third_party/WebKit/Source/core/dom/Element.cpp |
@@ -1937,6 +1937,7 @@ ShadowRoot* Element::attachShadow(const ScriptState* scriptState, const ShadowRo |
const AtomicString& tagName = localName(); |
bool tagNameIsSupported = isV0CustomElement() |
+ || isCustomElement() |
|| tagName == HTMLNames::articleTag |
|| tagName == HTMLNames::asideTag |
|| tagName == HTMLNames::blockquoteTag |