The clever partial timer I added interacts badly with iOS app launch
timeout termination. A fixed timeout will be easier to debug.

Change-Id: I6eb4ee5f1431539f00fa707e8cde6f3cf86983fc
Reviewed-on: https://go-review.googlesource.com/8083Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>