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

ui/ozone/platform/drm/drm.gypi

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'internal_ozone_platform_deps': [
       'ozone_platform_drm',
     ],
     'internal_ozone_platform_unittest_deps': [
@@ skipping 86 matching lines @@
         'host/drm_native_display_delegate.cc',
         'host/drm_native_display_delegate.h',
         'host/drm_window_host.cc',
         'host/drm_window_host.h',
         'host/drm_window_host_manager.cc',
         'host/drm_window_host_manager.h',
         'ozone_platform_drm.cc',
         'ozone_platform_drm.h',
         'scanout_buffer.h',
       ],
+      'conditions': [
+        # This is only present in actual device builds so we use it as a flag
+        # here to filter out code that can't run on the bots.
+        ['use_evdev_gestures==1', {

[dnicoara, 2015/05/14 17:43:18]

Lets not re-use event related defines for this kind of behavior. Add a DRM
specific flag.

+          'defines': [
+            'IS_DEVICE_BUILD',

[dnicoara, 2015/05/14 17:43:18]

You should also name this appropriately.

[achaulk, 2015/05/14 18:26:24]

To what? OS_IS_REALLY_CHROMEOS?

[dnicoara, 2015/05/14 18:31:37]

To SUPPORTS_SET_CLIENT_CAP or something similar. If you want, you can even use
'pkg-config --version libdrm' to figure out if the supplied version supports
said feature.

[achaulk, 2015/05/14 18:33:13]

We're also going to need to condition the atomic apis on this flag too, maybe
HAS_CHROMEOS_DRM?

[dnicoara, 2015/05/14 18:38:15]

How about HAS_ATOMIC_DRM_API? Just because chromeos has it doesn't mean that you
can't build outside the CrOS chroot.

+          ],
+        }]
+      ],
     },
     {
       'target_name': 'ozone_platform_drm_unittests',
       'type': 'none',
       'dependencies': [
         '../../build/linux/system.gyp:libdrm',
         '../../skia/skia.gyp:skia',
         '../gfx/gfx.gyp:gfx_geometry',
         'ozone.gyp:ozone',
       ],
       'export_dependent_settings': [
         '../../build/linux/system.gyp:libdrm',
         '../../skia/skia.gyp:skia',
         '../gfx/gfx.gyp:gfx_geometry',
       ],
       'direct_dependent_settings': {
         'sources': [
           'gpu/drm_surface_unittest.cc',
           'gpu/drm_window_unittest.cc',
           'gpu/hardware_display_controller_unittest.cc',
           'gpu/hardware_display_plane_manager_unittest.cc',
           'gpu/screen_manager_unittest.cc',
           'test/mock_drm_device.cc',
           'test/mock_drm_device.h',
         ],
       },
     },
   ],
 }