GitLab

TabStrip doesn't semantically need to be a ContextMenuController, this
hides that implementation detail as a nested class.

Bug: None
Change-Id: I2e46adbea0689300c964c8b8ceac3fe9ec12ee6b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1825789
Auto-Submit: Peter Boström <pbos@chromium.org>
Commit-Queue: Taylor Bergquist <tbergquist@chromium.org>
Reviewed-by: Taylor Bergquist <tbergquist@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700336}