Clean up printer preference handling.

chromeos/printing/printer_translator.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 CHROMEOS_PRINTING_PRINTER_TRANSLATOR_H_
 #define CHROMEOS_PRINTING_PRINTER_TRANSLATOR_H_
 
 #include <memory>
 
 #include "chromeos/chromeos_export.h"
 #include "chromeos/printing/printer_configuration.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace chromeos {
 namespace printing {
 
 CHROMEOS_EXPORT extern const char kPrinterId[];
 
-// Returns a new Printer populated with fields from |pref|.  Returns a nullptr
-// if |pref| does not contain an id field.
-CHROMEOS_EXPORT std::unique_ptr<Printer> PrefToPrinter(
-    const base::DictionaryValue& pref);
-
-// Returns a dictionary generated from the |printer| fields.
-CHROMEOS_EXPORT std::unique_ptr<base::DictionaryValue> PrinterToPref(
-    const Printer& printer);
-
 // Returns a new printer populated with the fields from |pref|.  Processes
 // dictionaries from policy i.e. cPanel.
 CHROMEOS_EXPORT std::unique_ptr<Printer> RecommendedPrinterToPrinter(
     const base::DictionaryValue& pref);
 
 }  // namespace printing
 }  // namespace chromeos
 
 #endif  // CHROMEOS_PRINTING_PRINTER_TRANSLATOR_H_