Bluetooth: BindOnce refactoring

BUG=714018

TBR=nick@chromium.org

Change-Id: Ic30f482175460a71c0a5cd78796bf9296ebc13c7
Reviewed-on: https://chromium-review.googlesource.com/963084
Commit-Queue: Mark Pilgrim <pilgrim@chromium.org>
Reviewed-by: Conley Owens <cco3@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543760}
3 files changed