ozone: Add ability to set clinet capabilities which we will need for atomic

ui/ozone/platform/drm/gpu/drm_device.cc

Index: ui/ozone/platform/drm/gpu/drm_device.cc
diff --git a/ui/ozone/platform/drm/gpu/drm_device.cc b/ui/ozone/platform/drm/gpu/drm_device.cc
index b547b080874550287f0c9fd3090a19e38b05ba7d..c22add1638d9285e594cbda30af312f34f382a7c 100644
--- a/ui/ozone/platform/drm/gpu/drm_device.cc
+++ b/ui/ozone/platform/drm/gpu/drm_device.cc
@@ -504,6 +504,10 @@ bool DrmDevice::CommitProperties(drmModePropertySet* properties,
 #endif  // defined(USE_DRM_ATOMIC)
 }
 
+bool DrmDevice::SetCapability(uint64_t capability, uint64_t value) {
+  return !drmSetClientCap(file_.GetPlatformFile(), capability, value);

[dnicoara, 2015/04/24 19:38:55]

nit:DCHECK(file_.IsValid());

+}
+
 bool DrmDevice::SetMaster() {
   DCHECK(file_.IsValid());
   return (drmSetMaster(file_.GetPlatformFile()) == 0);