ozone: Implement zero/one-copy texture for Ozone GBM.

build/linux/system.gyp

Index: build/linux/system.gyp
diff --git a/build/linux/system.gyp b/build/linux/system.gyp
index 476476ecdfab45c5cf7c0866a1a0029225e4b427..a6dd7f7fa5d2d1cf3fce462f41f162f944af2b97 100644
--- a/build/linux/system.gyp
+++ b/build/linux/system.gyp
@@ -532,6 +532,19 @@
         },
       ],
     }],
+    ['use_ozone==1', {

[vignatti (out of this project), 2015/05/14 19:20:04]

vgem only makes sense now under gbm, so you want to wrap this around
use_platform_gbm variable instead. Similarly, you will need to apply this same
logic for the gn and gyp code you're changing next in this CL. 

[dshwang, 2015/06/25 10:59:56]

indeed, but spang don't want to leak use_platform_gbm outside ui/ozone. target
drmheader is used in sandbox gyp. we don't want to let sandbox know ozone
platform detail. spang, do you have good idea?

+      'targets': [
+        {
+          'target_name': 'drmheader',
+          'type': 'none',
+          'direct_dependent_settings': {
+            'cflags': [
+              '<!@(<(pkg-config) --cflags libdrm)',
+            ],
+          },
+        },
+      ],
+    }],
     ['ozone_platform_dri==1 or ozone_platform_drm==1 or ozone_platform_gbm==1', {
       'targets': [
         {