Write mojom and StructTraits for display::GammaRampRGBEntry

ui/display/mojo/gamma_ramp_rgb_entry_struct_traits.cc

+// 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.
+
+#include "ui/display/mojo/gamma_ramp_rgb_entry_struct_traits.h"
+
+namespace mojo {
+
+// static
+bool StructTraits<display::mojom::GammaRampRGBEntryDataView,
+                  display::GammaRampRGBEntry>::
+    Read(display::mojom::GammaRampRGBEntryDataView data,
+         display::GammaRampRGBEntry* out) {
+  out->r = data.r();
+  out->g = data.g();
+  out->b = data.b();
+  return true;
+}
+
+}  // namespace mojo