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

ui/ozone/platform/cast/cast.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': {
     'cast_graphics_gyp%': '../../chromecast/chromecast.gyp',
     'libcast_media_gyp%': '../../chromecast/media/media.gyp',
     'internal_ozone_platform_deps': [
       'ozone_platform_cast',
@@ skipping 14 matching lines @@
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_geometry',
         '../../base/base.gyp:base',
         '../../chromecast/chromecast.gyp:cast_public_api',
         '../../chromecast/media/media.gyp:media_base',
       ],
       'defines': [
         'OZONE_IMPLEMENTATION',
       ],
       'sources': [
+        'client_native_pixmap_factory_cast.cc',
+        'client_native_pixmap_factory_cast.h',
         'gpu_platform_support_cast.cc',
         'gpu_platform_support_cast.h',
         'overlay_manager_cast.cc',
         'overlay_manager_cast.h',
         'ozone_platform_cast.cc',
         'ozone_platform_cast.h',
         'platform_window_cast.cc',
         'platform_window_cast.h',
         'surface_factory_cast.cc',
         'surface_factory_cast.h',
         'surface_ozone_egl_cast.cc',
         'surface_ozone_egl_cast.h',
       ],
     },
   ],
 }