GitLab

Fixes <2079112a>: accelerometer: Refactor AccelerometerFileReader

TryScheduleInitialize should be run in |ui_task_runner_| instead of
|blocking_task_runner_|.

BUG=chromium:1164449
TEST=unit tests

Change-Id: If242c2ba3e20f88db5f94261621d671629a786ea
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2617414Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Commit-Queue: Cheng-Hao Yang <chenghaoyang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841789}