[Background Sync] Skip waiting for resolution

of the register() promise for periodic Background
Sync registrations before firing periodicsync events.

Bug: 925297
Change-Id: I2eb5e07dbaeef75e01fad31ad1ae3557e5532185
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1712868
Commit-Queue: Mugdha Lakhani <nator@chromium.org>
Reviewed-by: Rayan Kanso <rayankans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#679637}
1 file changed