Expose ImeAdapter::advanceFocusInForm

A downstream change needs to be able to advance focus from outside
of the IME. See bug for details.

Bug: 938534
Change-Id: Iaac50da5a2b3b8459f18618a948e294656bc55ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1584701
Commit-Queue: Michael Thiessen <mthiesse@chromium.org>
Reviewed-by: Bo <boliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654228}
2 files changed