Merge72 [AF] Encode64 account hash for the Wallet Sync Transport opt-in.

TBR=sebsg@chromium.org

(cherry picked from commit a37f19afa363b73c9af728e5bbff597763f0899b)

Bug: 914935
Change-Id: I40c9f26a39db803d961f227e4dd8ec06ce3b2b6d
Reviewed-on: https://chromium-review.googlesource.com/c/1376810
Reviewed-by: David Benjamin <davidben@chromium.org>
Commit-Queue: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#616476}
Reviewed-on: https://chromium-review.googlesource.com/c/1380333
Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/branch-heads/3626@{#388}
Cr-Branched-From: d897fb137fbaaa9355c0c93124cc048824eb1e65-refs/heads/master@{#612437}
1 file changed