Implemented StructTraits for cc::TextureMailbox

cc/ipc/texture_mailbox.mojom

Index: cc/ipc/texture_mailbox.mojom
diff --git a/cc/ipc/texture_mailbox.mojom b/cc/ipc/texture_mailbox.mojom
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+// Copyright 2017 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 cc.mojom;
+
+import "gpu/ipc/common/mailbox_holder.mojom";
+import "ui/gfx/geometry/mojo/geometry.mojom";
+import "ui/gfx/mojo/color_space.mojom";
+
+// TODO(samans): Add shared_bitmap. See crbug.com/686221.
+// See cc/resources/texture_mailbox.h.
+struct TextureMailbox {
+  gpu.mojom.MailboxHolder mailbox_holder;
+  gfx.mojom.Size size_in_pixels;
+  bool is_overlay_candidate;
+  bool is_backed_by_surface_texture;
+  bool wants_promotion_hint;
+  bool secure_output_only;
+  bool nearest_neighbor;
+  gfx.mojom.ColorSpace color_space;
+};