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

extensions/browser/api/serial/serial_api.h

Index: extensions/browser/api/serial/serial_api.h
diff --git a/extensions/browser/api/serial/serial_api.h b/extensions/browser/api/serial/serial_api.h
index 272f11724a7636c61ef07f4ea00e2a29b6c8d3d5..1f6b1065caac75587502bfc0004a04c4311d0c39 100644
--- a/extensions/browser/api/serial/serial_api.h
+++ b/extensions/browser/api/serial/serial_api.h
@@ -246,10 +246,9 @@ class SerialSetControlSignalsFunction : public SerialAsyncApiFunction {
 namespace mojo {
 
 template <>
-class TypeConverter<device::serial::DeviceInfoPtr,
-                    linked_ptr<extensions::core_api::serial::DeviceInfo> > {
- public:
-  static linked_ptr<extensions::core_api::serial::DeviceInfo> ConvertTo(
+struct TypeConverter<linked_ptr<extensions::core_api::serial::DeviceInfo>,
+                     device::serial::DeviceInfoPtr> {
+  static linked_ptr<extensions::core_api::serial::DeviceInfo> Convert(
       const device::serial::DeviceInfoPtr& input);
 };