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

ui/ozone/public/pixmap_types.h

+// 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_PUBLIC_PIXMAP_TYPES_H_
+#define UI_OZONE_PUBLIC_PIXMAP_TYPES_H_
+
+namespace ui {
+
+// TODO: this is a placeholder for now and will be populated with more
+// formats once we know what sorts of content, video, etc. we can support.
+enum PixmapFormat {
+  PIXMAP_FORMAT_UNKNOWN,

[reveman, 2015/07/30 16:14:11]

Realize this is not new but it would be nice to avoid invalid enum values if
possible. Can we remove this?

[dshwang, 2015/07/31 10:41:04]

Done. removed.

+  PIXMAP_FORMAT_BGRA_8888,
+  PIXMAP_FORMAT_RGBX_8888,
+  PIXMAP_FORMAT_LAST = PIXMAP_FORMAT_RGBX_8888

[reveman, 2015/07/30 16:14:11]

Is PIXMAP_FORMAT_LAST used for IPC? If not, can we remove it?

[dshwang, 2015/07/31 10:41:04]

It's used for IPC in ozone_gpu_messages.h

+};
+
+enum PixmapUsage {
+  PIXMAP_USAGE_MAP,
+  PIXMAP_USAGE_PERSISTENT_MAP,
+  PIXMAP_USAGE_SCANOUT,
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PUBLIC_PIXMAP_TYPES_H_