vk: Rename KeyboardControllerState -> KeyboardUIState.

KeyboardControllerState is not really the state of the keyboard
controller, but rather the state of the keyboard UI (whether it's shown
etc.)

TBR=sky@chromium.org

Bug: 964191
Change-Id: Id610f2b0a5ddfe2b80fc8d9bbaf57a0df2cdce43
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1619442
Commit-Queue: Darren Shen <shend@chromium.org>
Auto-Submit: Darren Shen <shend@chromium.org>
Reviewed-by: Yuichiro Hanada <yhanada@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661579}
6 files changed