Modernize some Android tab code.

Change-Id: I9bf3b74b520913c9bde9a98c8e146d86d83f95b7
Reviewed-on: https://chromium-review.googlesource.com/c/1414075
Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623834}
2 files changed