Start plumbing drm atomic swap.

ui/ozone/platform/dri/dri.gypi

Index: ui/ozone/platform/dri/dri.gypi
diff --git a/ui/ozone/platform/dri/dri.gypi b/ui/ozone/platform/dri/dri.gypi
index 2dcb782b5cf247a8a177c2cdce6acc5e0f1af993..e26cb208969f7aa3255d9b3a9f0a533d1197c07b 100644
--- a/ui/ozone/platform/dri/dri.gypi
+++ b/ui/ozone/platform/dri/dri.gypi
@@ -13,6 +13,7 @@
     'internal_ozone_platforms': [
       'dri',
     ],
+    'use_drm_atomic_flip%': 0,

[dnicoara, 2014/07/11 15:24:04]

One thing that I forgot to mention yesterday was testing without having this
present in your GYP_DEFINES.

[alexst (slow to review), 2014/07/11 20:19:43]

I did it today, it works as expected by flipping this flag.

   },
   'targets': [
     {
@@ -68,6 +69,14 @@
         'virtual_terminal_manager.cc',
         'virtual_terminal_manager.h',
       ],
+      'conditions': [
+        ['use_drm_atomic_flip==1', {
+          'sources': [
+            'hardware_display_plane.cc',
+	    'hardware_display_plane.h',
+          ],
+        }],
+      ],      
     },
     {
       'target_name': 'ozone_platform_dri_unittests',