Disable linux_aura on the main builders.

Disable linux_aura on the main builders.

Currently, browser_tests are running 2x-3x slower on the bots. Our first
dev channel has been very enlightening and got people to file all sorts
of helpful bugs.

BUG=319075, 125106, 303342, 318961
NOTRY=True
R=cmp@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=235280

[Elliot Glaysher, 2013-11-14 23:35:55]

I'm waiting for trybots here since we haven't had coverage since Saturday.

[cmp, 2013-11-15 00:45:40]

lgtm

The problem with waiting for try bots is that this is fixing the problem that
will cause the try bot results to take a long time to come in.

If it's a revert, no need to wait for try bots.  If it's not a revert, yeah, I
suppose we'll need to wait for the bots, but maybe not all of them?

[Dirk Pranke, 2013-11-15 00:49:46]

The problem is that it's fairly possible that things have landed since the
original CL that may break the Gtk (non-Aura) version. If we were to land this
right away, the tree might be red for an indefinite period of time. That said,
looks like most of the bots are pretty green, fortunately.

[cmp, 2013-11-15 00:58:27]

Yeah, that's a good point.  Green builds are good and fingers crossed for the
rest.

[agable, 2013-11-15 01:10:59]

On 2013/11/15 00:58:27, cmp wrote:
> Yeah, that's a good point.  Green builds are good and fingers crossed for the
> rest.

The only linux failure here is browser_tests on linux_swarm_triggered, but they
look like real failures (not just the timeouts we've been seeing on the main
waterfall).

[agable, 2013-11-15 03:20:49]

Committed patchset #1 manually as r235280.