Fix typo in SadTabViewCocoa (from SabTabViewCocoa)

The class SadTabViewCocoa has a typo and is currently
named SabTabViewCocoa. This commit renames the class
to the correct name.

TBR=avi@chromium.org

Bug: 803406
Change-Id: Id290fe8d016fe0fae9c760cb556e7c8896d17426
Reviewed-on: https://chromium-review.googlesource.com/1141569
Reviewed-by: Daniel Bratell <bratell@opera.com>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#575986}
4 files changed