Change TypeConverter<X,Y>::ConvertFrom and ConvertTo into a single symmetric

extensions/browser/api/serial/serial_connection.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_API_SERIAL_SERIAL_CONNECTION_H_
 #define EXTENSIONS_BROWSER_API_SERIAL_SERIAL_CONNECTION_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 178 matching lines @@
 
   // Asynchronous I/O handler.
   scoped_refptr<device::SerialIoHandler> io_handler_;
 };
 
 }  // namespace extensions
 
 namespace mojo {
 
 template <>
-class TypeConverter<device::serial::HostControlSignalsPtr,
-                    extensions::core_api::serial::HostControlSignals> {
- public:
-  static device::serial::HostControlSignalsPtr ConvertFrom(
+struct TypeConverter<device::serial::HostControlSignalsPtr,
+                     extensions::core_api::serial::HostControlSignals> {
+  static device::serial::HostControlSignalsPtr Convert(
       const extensions::core_api::serial::HostControlSignals& input);
 };
 
 template <>
-class TypeConverter<device::serial::ConnectionOptionsPtr,
-                    extensions::core_api::serial::ConnectionOptions> {
- public:
-  static device::serial::ConnectionOptionsPtr ConvertFrom(
+struct TypeConverter<device::serial::ConnectionOptionsPtr,
+                     extensions::core_api::serial::ConnectionOptions> {
+  static device::serial::ConnectionOptionsPtr Convert(
       const extensions::core_api::serial::ConnectionOptions& input);
 };
 
 }  // namespace mojo
 
 #endif  // EXTENSIONS_BROWSER_API_SERIAL_SERIAL_CONNECTION_H_