Clarify virtual keyboard flag

Change-Id: I229fe8012c5ec1c9fac5f540f3d0ed68284adb99
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1860196
Reviewed-by: Darren Shen <[email protected]>
Commit-Queue: David Vallet <[email protected]>
Cr-Commit-Position: refs/heads/master@{#705699}
1 file changed