Mojo C++ bindings: switch the remaining callsites of the old serialization interface.

mojo/public/cpp/bindings/lib/string_serialization.cc

-// Copyright 2014 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 "mojo/public/cpp/bindings/lib/string_serialization.h"
-
-#include "mojo/public/cpp/bindings/lib/serialization.h"
-
-namespace mojo {
-
-size_t GetSerializedSize_(const String& input,
-                          internal::SerializationContext* context) {
-  return internal::PrepareToSerialize<String>(input, context);
-}
-
-void Serialize_(const String& input,
-                internal::Buffer* buf,
-                internal::String_Data** output,
-                internal::SerializationContext* context) {
-  internal::Serialize<String>(input, buf, output, context);
-}
-
-bool Deserialize_(internal::String_Data* input,
-                  String* output,
-                  internal::SerializationContext* context) {
-  return internal::Deserialize<String>(input, output, context);
-}
-
-}  // namespace mojo