GitLab

In the future, we want KeyboardController to automatically
enable/disable itself when flags change. This means that we no longer
need to go through AshKeyboardController to enable/disable. However,
AshKeyboardController currently is responsible for pre-loading the
VK window when the VK gets enabled.

Hence, we'll move preloading code from AshKeyboardController to
KeyboardController. This doesn't affect real world execution, but
does affect some tests.

TBR=jamescook@chromium.org

Bug: 845780
Change-Id: Ib3cf897261497c7ff8a0c7b58739e4f0e9498b35
Reviewed-on: https://chromium-review.googlesource.com/c/1419597Reviewed-by: Darren Shen <shend@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#626869}