Refactor to use AddChildView<T>, AddTab<T> and Tab::SetTitleText for translate bubble.

Bug: 974811
Change-Id: Ie7d2b0cffaa96a908b5c5a905b3e4e928452a436
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1658651
Reviewed-by: anthonyvd <anthonyvd@chromium.org>
Commit-Queue: Allen Bauer <kylixrd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672244}
2 files changed