[Autofill Assistant] Add ShowInfoBox to the set of actions.

Before this path a ShowInfoBox was not added to the list of actions to
execute. This patch adds the missing case statement to do that.

We are discussing ways of finding these issues at compile time since the
default case may not be strictly needed in this case.

Bug: b/125291252
Change-Id: I573834c307c341bd3bec9524140bbddc2883df38
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1529278
Reviewed-by: Clemens Arbesser <arbesser@google.com>
Commit-Queue: Mathias Carlen <mcarlen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#641842}
1 file changed