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

third_party/WebKit/Source/platform/mojo/CommonCustomTypesStructTraits.h

+// 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.
+
+#ifndef CommonCustomTypesStructTraits_h
+#define CommonCustomTypesStructTraits_h
+
+#include "mojo/common/common_custom_types.mojom-blink.h"
+#include "platform/PlatformExport.h"
+
+namespace mojo {
+
+template <>
+struct PLATFORM_EXPORT
+    StructTraits<mojo::common::mojom::String16DataView, ::blink::WebString> {
+  static WTF::Vector<uint16_t> data(const ::blink::WebString&);
+  static bool Read(mojo::common::mojom::String16DataView,
+                   ::blink::WebString* out);
+};
+
+}  // namespace mojo
+
+#endif  // CommonCustomTypesStructTraits_h