GitLab

To avoid confusion when there is no internal keyboard connected:
- We should not show the option to remap the internal "Search"
key since that key doesn't exist.
- We should also avoid labeling the options to remap the external
meta keys as "External Meta" or "External Command", and just say
"Meta" or "Command" as "External" here is redundant.

TBR=stevenjb@chromium.org
BUG=890522, 890950
TEST=Expanded existing tests.

Reviewed-on: https://chromium-review.googlesource.com/c/1253022Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Ahmed Fakhry <afakhry@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#599409}
Change-Id: I3136efe54d2544423e4dd9b23fe8ffabffe3caf0
Reviewed-on: https://chromium-review.googlesource.com/c/1292890Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601403}