GitLab

Adds registering the ui::mojom::Arc interface.
Adds early to AccessibilityController::UpdateVirtualKeyboardFromPref.

BUG=837686
TEST=none

Change-Id: If417134ed26931a050e9bfdfd4b267d8ee819b9a
Reviewed-on: https://chromium-review.googlesource.com/1111012Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569413}