Mojo C++ bindings: make String16 and gfx::Size available in Blink

third_party/WebKit/Source/platform/mojo/GeometryStructTraits.cpp

+// 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.
+
+#include "platform/mojo/GeometryStructTraits.h"
+
+namespace mojo {
+
+// static
+bool StructTraits<gfx::mojom::blink::Size::DataView, ::blink::WebSize>::Read(
+    gfx::mojom::blink::Size::DataView data,
+    ::blink::WebSize* out) {
+  if (data.width() < 0 || data.height() < 0)
+    return false;
+  out->width = data.width();
+  out->height = data.height();
+  return true;
+}
+
+}  // namespace mojo