[Extensions] Convert APIs to use movable types [13]

extensions/browser/api/serial/serial_api.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_API_H_
 #define EXTENSIONS_BROWSER_API_SERIAL_SERIAL_API_H_
 
 #include <string>
 
 #include "device/serial/serial.mojom.h"
@@ skipping 260 matching lines @@
   scoped_ptr<serial::ClearBreak::Params> params_;
 };
 
 }  // namespace api
 
 }  // namespace extensions
 
 namespace mojo {
 
 template <>
-struct TypeConverter<linked_ptr<extensions::api::serial::DeviceInfo>,
+struct TypeConverter<extensions::api::serial::DeviceInfo,
                      device::serial::DeviceInfoPtr> {
-  static linked_ptr<extensions::api::serial::DeviceInfo> Convert(
+  static extensions::api::serial::DeviceInfo Convert(
       const device::serial::DeviceInfoPtr& input);
 };
 
 }  // namespace mojo
 
 #endif  // EXTENSIONS_BROWSER_API_SERIAL_SERIAL_API_H_