GitLab

aw: Remove native source_set

Since native/ has been entirely moved into browser/, the target should
move as well. Cleaned up a few unneeded DEPS as well.

BUG=716604

Change-Id: I77fb632279b96318e5aa6d4eefe70046df41188f
Reviewed-on: https://chromium-review.googlesource.com/503647Reviewed-by: Richard Coles <torne@chromium.org>
Commit-Queue: Bo Liu <boliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#471123}