Revert 207377 "Disable TabCaptureApiTest.EndToEnd for Linux (non..."
r208537 fixed flakes on Win rel, and there's a very good chance it should have fixed the Linux dbg flakes too.
> Disable TabCaptureApiTest.EndToEnd for Linux (non-Aura) debug builds.
>
> BUG=174640,251863
> TBR=asargent
>
> Review URL: https://chromiumcodereview.appspot.com/
17165006
BUG=251863
TBR=miu@chromium.org
Review URL: https://codereview.chromium.org/
18155002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@209002 0039d316-1c4b-4281-b951-d872f2087c98