Replicate whether a frame is in a document or shadow tree.

components/html_viewer/html_document.h

Index: components/html_viewer/html_document.h
diff --git a/components/html_viewer/html_document.h b/components/html_viewer/html_document.h
index ffd549f2f9eedbe16565b20c60a4a3e9f33ddde6..4c3ec64fa6a020f502497416dc42586719ac8052 100644
--- a/components/html_viewer/html_document.h
+++ b/components/html_viewer/html_document.h
@@ -95,6 +95,7 @@ class HTMLDocument : public blink::WebViewClient,
       blink::WebContentDecryptionModule* initial_cdm);
   virtual blink::WebFrame* createChildFrame(
       blink::WebLocalFrame* parent,
+      blink::WebTreeScopeType scope,
       const blink::WebString& frameName,
       blink::WebSandboxFlags sandboxFlags);
   virtual void frameDetached(blink::WebFrame*);