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

ui/ozone/platform/drm/ozone_platform_drm.cc

Index: ui/ozone/platform/drm/ozone_platform_drm.cc
diff --git a/ui/ozone/platform/drm/ozone_platform_drm.cc b/ui/ozone/platform/drm/ozone_platform_drm.cc
index 0d40c719b4f44861e4d0da4501b382e309608665..119b038e8023e49266cd9e311f77480b418872f3 100644
--- a/ui/ozone/platform/drm/ozone_platform_drm.cc
+++ b/ui/ozone/platform/drm/ozone_platform_drm.cc
@@ -28,6 +28,7 @@
 #include "ui/ozone/platform/drm/host/drm_overlay_manager.h"
 #include "ui/ozone/platform/drm/host/drm_window_host.h"
 #include "ui/ozone/platform/drm/host/drm_window_host_manager.h"
+#include "ui/ozone/public/native_pixmap_manager.h"
 #include "ui/ozone/public/ozone_gpu_test_helper.h"
 #include "ui/ozone/public/ozone_platform.h"
 
@@ -165,4 +166,12 @@ OzonePlatform* CreateOzonePlatformDrm() {
   return new OzonePlatformDrm;
 }
 
+NativePixmapManager* CreateNativePixmapManagerDri() {
+  return CreateStubNativePixmapManager();
+}
+
+NativePixmapManager* CreateNativePixmapManagerDrm() {
+  return CreateStubNativePixmapManager();
+}
+
 }  // namespace ui