GitLab

Test NavigatorTestWithBrowserSideNavigation.BeginNavigation was broken
due to the way the subframe used was added to the tree. By directly
calling FrameTree::AddFrame the proper observer notifications were not
being executed and triggered a sanity check. It was replaced with the
already test-tailored TestRenderFrameHost::AppendChild.

BUG=455484

Review URL: https://codereview.chromium.org/904673004

Cr-Commit-Position: refs/heads/master@{#315063}