Fix setting the top-level FrameTreeNode name for named windows.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 2e6a5f7556dd8378d2b796a9d676fa9c9ce0472c..abf7e4bc9e50a2f0cb90453b9f37f9bc9d6a7786 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -1204,6 +1204,7 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
   GetRenderManager()->Init(
       params.browser_context, params.site_instance, params.routing_id,
       params.main_frame_routing_id);
+  frame_tree_.root()->SetFrameName(params.main_frame_name);
 
   WebContentsViewDelegate* delegate =
       GetContentClient()->browser()->GetWebContentsViewDelegate(this);
@@ -1582,6 +1583,7 @@ void WebContentsImpl::CreateNewWindow(
   CreateParams create_params(GetBrowserContext(), site_instance.get());
   create_params.routing_id = route_id;
   create_params.main_frame_routing_id = main_frame_route_id;
+  create_params.main_frame_name = base::UTF16ToUTF8(params.frame_name);
   create_params.opener = this;
   create_params.opener_suppressed = params.opener_suppressed;
   if (params.disposition == NEW_BACKGROUND_TAB)