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

ui/ozone/platform/drm/ozone_platform_gbm.cc

Index: ui/ozone/platform/drm/ozone_platform_gbm.cc
diff --git a/ui/ozone/platform/drm/ozone_platform_gbm.cc b/ui/ozone/platform/drm/ozone_platform_gbm.cc
index 4d9175c52830908bc8058e3298051b6565e5e684..175f033fcfb8af47bb168520cd32f0aeb502c758 100644
--- a/ui/ozone/platform/drm/ozone_platform_gbm.cc
+++ b/ui/ozone/platform/drm/ozone_platform_gbm.cc
@@ -79,8 +79,8 @@ class GbmBufferGenerator : public ScanoutBufferGenerator {
   scoped_refptr<ScanoutBuffer> Create(const scoped_refptr<DrmDevice>& drm,
                                       const gfx::Size& size) override {
     scoped_refptr<GbmDevice> gbm(static_cast<GbmDevice*>(drm.get()));
-    return GbmBuffer::CreateBuffer(gbm, SurfaceFactoryOzone::BGRA_8888, size,
-                                   SurfaceFactoryOzone::SCANOUT);
+    return GbmBuffer::CreateBuffer(gbm, NATIVE_PIXMAP_FORMAT_BGRA_8888, size,
+                                   NATIVE_PIXMAP_USAGE_SCANOUT);
   }
 
  protected: