Remove mojo download from dartium DEPS

Remove mojo download from dartium DEPS

This step is causing failures on the buildbots, so if it isn't needed,
we can remove it.  The scripts try and use gsutil in an incorrect location,
and we can no longer manually copy it because the buildbots have started
automatically removing it.

BUG=https://github.com/dart-lang/sdk/issues/28248
R=kustermann@google.com

Committed: https://github.com/dart-lang/sdk/commit/b226f6c3c2e7d46f9ada2c67712deb22eebe11ac

[Bill Hesse, 2017-03-03 16:25:37]

whesse@google.com changed reviewers:
+ kustermann@google.com, terry@google.com

[Bill Hesse, 2017-03-03 16:25:38]

Terry, please test this to see if the dartium build still requires mojo shell
download.

I'm running a test on the dartium-linux-full-dev builder right now of skipping
that step.

I've also made the gsutil copy that was being deleted read-only, so this may fix
the builder problem as well, if it turns out we can't delete this step.

[kustermann, 2017-03-03 16:35:35]

lgtm - it's worth a try

[Bill Hesse, 2017-03-06 08:32:50]

Description was changed from

==========
Remove mojo download from dartium DEPS

This step is causing failures on the buildbots, so if it isn't needed,
we can remove it.  The scripts try and use gsutil in an incorrect location,
and we can no longer manually copy it because the buildbots have started
automatically removing it.

BUG=https://github.com/dart-lang/sdk/issues/28248
==========

to

==========
Remove mojo download from dartium DEPS

This step is causing failures on the buildbots, so if it isn't needed,
we can remove it.  The scripts try and use gsutil in an incorrect location,
and we can no longer manually copy it because the buildbots have started
automatically removing it.

BUG=https://github.com/dart-lang/sdk/issues/28248
R=kustermann@google.com

Committed:
https://github.com/dart-lang/sdk/commit/b226f6c3c2e7d46f9ada2c67712deb22eebe11ac
==========

[Bill Hesse, 2017-03-06 08:32:51]

Committed patchset #1 (id:1) manually as
b226f6c3c2e7d46f9ada2c67712deb22eebe11ac (presubmit successful).