GitLab

This re-introduces a smaller bug fixed by r231370 until the underlying
problem in WebDataSource::replacesCurrentHistoryItem is resolved.

BUG=313572, 311271
TEST=Try to add an app in CWS when not signed in.  Go back from signin page.
R=nasko@chromium.org

Review URL: https://codereview.chromium.org/59073010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233454 0039d316-1c4b-4281-b951-d872f2087c98