[Ozone] Update GYP and GN to include a DRM platform

[Ozone] Update GYP and GN to include a DRM platform

This makes it possible to refer to the platform as DRI and DRM. We need
this intermediate state so we can update the CrOS builds to use DRM
rather than DRI.

BUG=none
TEST=Build ozone with DRI & DRM platform and without to verify build
(GYP and GN)

Committed: https://crrev.com/d89b572673f0fd352ae9d14e69b79e0430c87fbd
Cr-Commit-Position: refs/heads/master@{#320788}

[dnicoara, 2015-03-04 16:45:35]

dnicoara@chromium.org changed reviewers:
+ spang@chromium.org

[dnicoara, 2015-03-04 16:45:35]

PTAL

[spang, 2015-03-09 16:43:33]

lgtm

[dnicoara, 2015-03-09 16:56:21]

dnicoara@chromium.org changed reviewers:
+ brettw@chromium.org

[dnicoara, 2015-03-09 16:56:22]

+ brettw@ for build/ changes

[dnicoara, 2015-03-12 17:03:11]

On 2015/03/09 16:56:22, dnicoara wrote:
> + brettw@ for build/ changes

ping

[brettw, 2015-03-13 23:14:48]

Sorry for the delay, catching up after vacation.

https://codereview.chromium.org/957253005/diff/20001/ui/ozone/BUILD.gn
File ui/ozone/BUILD.gn (right):

https://codereview.chromium.org/957253005/diff/20001/ui/ozone/BUILD.gn#newcode32
ui/ozone/BUILD.gn:32: if (ozone_platform_dri || ozone_platform_drm) {
Can you explain here why dri and drm imply each other? Why do we have separate
flags for these in the first place?

[spang, 2015-03-14 00:04:15]

On 2015/03/13 23:14:48, brettw wrote:
> Sorry for the delay, catching up after vacation.
> 
> https://codereview.chromium.org/957253005/diff/20001/ui/ozone/BUILD.gn
> File ui/ozone/BUILD.gn (right):
> 
>
https://codereview.chromium.org/957253005/diff/20001/ui/ozone/BUILD.gn#newcode32
> ui/ozone/BUILD.gn:32: if (ozone_platform_dri || ozone_platform_drm) {
> Can you explain here why dri and drm imply each other? Why do we have separate
> flags for these in the first place?

We're renaming it but providing a window where both names work to make the
transition possible. A comment would probably be good.

[spang, 2015-03-14 00:06:53]

On 2015/03/14 00:04:15, spang wrote:
> On 2015/03/13 23:14:48, brettw wrote:
> > Sorry for the delay, catching up after vacation.
> > 
> > https://codereview.chromium.org/957253005/diff/20001/ui/ozone/BUILD.gn
> > File ui/ozone/BUILD.gn (right):
> > 
> >
>
https://codereview.chromium.org/957253005/diff/20001/ui/ozone/BUILD.gn#newcode32
> > ui/ozone/BUILD.gn:32: if (ozone_platform_dri || ozone_platform_drm) {
> > Can you explain here why dri and drm imply each other? Why do we have
separate
> > flags for these in the first place?
> 
> We're renaming it but providing a window where both names work to make the
> transition possible. A comment would probably be good.

We could rename immediately in GN, though, since our CrOS builds don't use GN
and wont' break. GYP is a different story.

[brettw, 2015-03-16 17:57:03]

Okay, if this is going away soon it's OK. LGTM

[dnicoara, 2015-03-16 19:24:08]

The CQ bit was checked by dnicoara@chromium.org

[commit-bot: I haz the power, 2015-03-16 19:24:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/957253005/20001

[commit-bot: I haz the power, 2015-03-16 20:46:01]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-16 20:46:37]

Patchset 2 (id:??) landed as
https://crrev.com/d89b572673f0fd352ae9d14e69b79e0430c87fbd
Cr-Commit-Position: refs/heads/master@{#320788}