[VK] Disable shadows in new UI.

In the new UI, we have to draw the keyboard drop shadow manually in the
extension because of the non-rectangular geometry of the new floating
keyboard. So we just disable shadows. When shadows are added in the
extension, the keyboard window should resize correctly.

Change-Id: I8530779930c109c834f33c5f673dbcc553ced6a2
Reviewed-on: https://chromium-review.googlesource.com/1139948
Commit-Queue: Darren Shen <shend@chromium.org>
Reviewed-by: Yuichiro Hanada <yhanada@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575853}
1 file changed