Fix broken AttachContext from r152289

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index 4b4c6413ee03f3893f8eb26abed04fb044d1470f..f6dec24b0f7f9c040f9773aff97a43575d4f4910 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -1279,7 +1279,7 @@ void Element::attach(const AttachContext& context)
     // When a shadow root exists, it does the work of attaching the children.
     if (ElementShadow* shadow = this->shadow()) {
         parentPusher.push();
-        shadow->attach();
+        shadow->attach(context);
     } else if (firstChild())
         parentPusher.push();
 
@@ -1318,8 +1318,8 @@ void Element::detach(const AttachContext& context)
     }
 
     if (ElementShadow* shadow = this->shadow()) {
-        detachChildrenIfNeeded();
-        shadow->detach();
+        detachChildrenIfNeeded(context);
+        shadow->detach(context);
     }
     ContainerNode::detach(context);
 }