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 7003675a5570233f05ad4e4d54e441ca8274acd1..0401580cc346922aa11251699a1ee1781ef884c5 100644 |
--- a/third_party/WebKit/Source/core/dom/Element.cpp |
+++ b/third_party/WebKit/Source/core/dom/Element.cpp |
@@ -1952,6 +1952,8 @@ PassRefPtrWillBeRawPtr<ShadowRoot> Element::attachShadow(const ScriptState* scri |
return nullptr; |
} |
+ document().styleEngine().setUseCascadeOrderForShadowDOMV1(); |
+ |
ShadowRootType type = ShadowRootType::V0; |
if (shadowRootInitDict.hasMode()) |
type = shadowRootInitDict.mode() == "open" ? ShadowRootType::Open : ShadowRootType::Closed; |