Prepare //build/module_args/mojo.gni for upcoming Mojo rolls

Prepare //build/module_args/mojo.gni for upcoming Mojo rolls

These variables will start being used by BUILD.gn files in the Mojo
repo shortly, so ensure that Chromium has the right values set for them.

Committed: https://crrev.com/ac3f7624d4f83ba067e16e9fc49c4ad87fa38841
Cr-Commit-Position: refs/heads/master@{#315991}

[blundell, 2015-02-12 14:25:19]

blundell@chromium.org changed reviewers:
+ jochen@chromium.org, scottmg@chromium.org, thakis@chromium.org

[blundell, 2015-02-12 14:25:20]

Whoever gets to it first wins. Thanks!

[scottmg, 2015-02-12 16:29:49]

It looks like there are references to
https://code.google.com/p/chromium/codesearch#search/&q=use_prebuilt_mojo_she...
. Are those going to break in the interim?

[blundell, 2015-02-12 16:41:55]

On 2015/02/12 16:29:49, scottmg wrote:
> It looks like there are references to
>
https://code.google.com/p/chromium/codesearch#search/&q=use_prebuilt_mojo_she...
> . Are those going to break in the interim?

Good question. No. The references passing it as a buildarg are stale. The other
references go through //third_party/mojo/src/mojo/public/mojo.gni, which defines
use_prebuilt_mojo_shell to true if it's not defined in
//build/module_args/mojo.gni.

Note that my CL isn't actually changing anything about use_prebuilt_mojo_shell:
I simply deleted the commented-out assignment to the variable.

[scottmg, 2015-02-12 16:45:49]

Sorry, not enough coffee yet, didn't notice that was commented out.

lgtm

[blundell, 2015-02-12 16:46:50]

On 2015/02/12 16:45:49, scottmg wrote:
> Sorry, not enough coffee yet, didn't notice that was commented out.
> 
> lgtm

It's a fair question!

[blundell, 2015-02-12 16:46:55]

The CQ bit was checked by blundell@chromium.org

[commit-bot: I haz the power, 2015-02-12 16:47:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/921763002/1

[commit-bot: I haz the power, 2015-02-12 16:51:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-12 16:51:50]

Patchset 1 (id:??) landed as
https://crrev.com/ac3f7624d4f83ba067e16e9fc49c4ad87fa38841
Cr-Commit-Position: refs/heads/master@{#315991}