ozone: Introduce ClientPixmap and ClientPixmapFactory for non-GPU processes.

ui/ozone/platform/drm/gbm.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_gbm',
     ],
     'internal_ozone_platforms': [
@@ skipping 15 matching lines @@
         '../events/events.gyp:events',
         '../events/ozone/events_ozone.gyp:events_ozone',
         '../events/ozone/events_ozone.gyp:events_ozone_evdev',
         '../events/ozone/events_ozone.gyp:events_ozone_layout',
         '../gfx/gfx.gyp:gfx',
       ],
       'defines': [
         'OZONE_IMPLEMENTATION',
       ],
       'sources': [
+        'common/native_pixmap_manager_gbm.cc',
+        'common/native_pixmap_manager_gbm.h',
         'gpu/gbm_buffer.cc',
         'gpu/gbm_buffer.h',
         'gpu/gbm_buffer_base.cc',
         'gpu/gbm_buffer_base.h',
         'gpu/gbm_device.cc',
         'gpu/gbm_device.h',
         'gpu/gbm_surface.cc',
         'gpu/gbm_surface.h',
         'gpu/gbm_surface_factory.cc',
         'gpu/gbm_surface_factory.h',
         'gpu/gbm_surfaceless.cc',
         'gpu/gbm_surfaceless.h',
         'ozone_platform_gbm.cc',
         'ozone_platform_gbm.h',
       ],
       'conditions': [
         ['use_mesa_platform_null==1', {
           'defines': ['USE_MESA_PLATFORM_NULL'],
         }],
       ],
     },
   ],
 }