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

ui/ozone/platform/drm/common/client_native_pixmap_factory_gbm.h

Index: ui/ozone/platform/drm/common/client_native_pixmap_factory_gbm.h
diff --git a/ui/ozone/platform/drm/common/client_native_pixmap_factory_gbm.h b/ui/ozone/platform/drm/common/client_native_pixmap_factory_gbm.h
new file mode 100644
index 0000000000000000000000000000000000000000..606f0d38f8170f3954ac74aca94163963434c246
--- /dev/null
+++ b/ui/ozone/platform/drm/common/client_native_pixmap_factory_gbm.h
@@ -0,0 +1,17 @@
+// Copyright 2015 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.
+
+#ifndef UI_OZONE_PLATFORM_DRM_COMMON_CLIENT_NATIVE_PIXMAP_FACTORY_GBM_H_
+#define UI_OZONE_PLATFORM_DRM_COMMON_CLIENT_NATIVE_PIXMAP_FACTORY_GBM_H_
+
+namespace ui {
+
+class ClientNativePixmapFactory;
+
+// Constructor hook for use in constructor_list.cc
+ClientNativePixmapFactory* CreateClientNativePixmapFactoryGbm();
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_COMMON_CLIENT_NATIVE_PIXMAP_FACTORY_GBM_H_