Delete session cookie when session is expired

When the session is expired and we show the dialog box telling the
user their session is dead, delete the cookie if they click "Close".
This way they can at least continue to use the browser session and
not receive futher error dialogs.

Bug: issue 385
Change-Id: I4eccf39bba693dd4b0ad63aa0887511d7929ec52
Signed-off-by: Shawn O. Pearce <sop@google.com>
2 files changed