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

mojo/common/common_custom_types_struct_traits.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 MOJO_COMMON_COMMON_CUSTOM_TYPES_STRUCT_TRAITS_H_
 #define MOJO_COMMON_COMMON_CUSTOM_TYPES_STRUCT_TRAITS_H_
 
+#include "base/strings/utf_string_conversions.h"
 #include "base/unguessable_token.h"
 #include "base/version.h"
 #include "mojo/common/common_custom_types.mojom-shared.h"
 #include "mojo/common/mojo_common_export.h"
 
 namespace mojo {
 
 template <>
+struct StructTraits<mojo::common::mojom::String16DataView, base::string16> {
+  static std::vector<uint16_t> data(const base::string16& str);
+  static bool Read(mojo::common::mojom::String16DataView data,
+                   base::string16* out);
+};
+
+template <>
 struct StructTraits<mojo::common::mojom::VersionDataView, base::Version> {
   static bool IsNull(const base::Version& version) {
       return !version.IsValid();
   }
   static void SetToNull(base::Version* out) {
       *out = base::Version(std::string());
   }
   static const std::vector<uint32_t>& components(const base::Version& version);
   static bool Read(mojo::common::mojom::VersionDataView data,
                    base::Version* out);
@@ skipping 28 matching lines @@
   static bool Read(mojo::common::mojom::TimeDeltaDataView data,
                    base::TimeDelta* delta) {
     *delta = base::TimeDelta::FromMicroseconds(data.microseconds());
     return true;
   }
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_COMMON_COMMON_CUSTOM_TYPES_STRUCT_TRAITS_H_