Implement gfx::SelectionBound StructTraits

ui/gfx/mojo/selection_bound.mojom

Index: ui/gfx/mojo/selection_bound.mojom
diff --git a/ui/gfx/mojo/selection_bound.mojom b/ui/gfx/mojo/selection_bound.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..2544401bc511ce305812da22e615b80c7cf01820
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+++ b/ui/gfx/mojo/selection_bound.mojom
@@ -0,0 +1,24 @@
+// 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;
+
+import "ui/gfx/geometry/mojo/geometry.mojom";
+
+enum SelectionBoundType {
+  LEFT,
+  RIGHT,
+  CENTER,
+  EMPTY,
+  LAST = EMPTY
+};
+
+// See ui/gfx/selection_bound.h.
+struct SelectionBound {
+  SelectionBoundType type;
+  gfx.mojom.PointF edge_top;
+  gfx.mojom.PointF edge_bottom;
+  bool visible;
+};
+