mojo: Struct traits for gpu buffer types.

ui/gfx/mojo/buffer_types.mojom

Index: ui/gfx/mojo/buffer_types.mojom
diff --git a/ui/gfx/mojo/buffer_types.mojom b/ui/gfx/mojo/buffer_types.mojom
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+// Copyright 2016 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.
+
+module gfx.mojom;
+
+// gfx::BufferFormat
+enum BufferFormat {
+  ATC,
+  ATCIA,
+  DXT1,
+  DXT5,
+  ETC1,
+  R_8,
+  BGR_565,
+  RGBA_4444,
+  RGBX_8888,
+  RGBA_8888,
+  BGRX_8888,
+  BGRA_8888,
+  YVU_420,
+  YUV_420_BIPLANAR,
+  UYVY_422,
+
+  LAST = UYVY_422
+};
+
+// gfx::BufferUsage
+enum BufferUsage {
+  GPU_READ,
+  SCANOUT,
+  GPU_READ_CPU_READ_WRITE,
+  GPU_READ_CPU_READ_WRITE_PERSISTENT,
+
+  LAST = GPU_READ_CPU_READ_WRITE_PERSISTENT
+};