Add an autoconf field to printer objects.

chromeos/printing/printer_configuration.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_CONFIGURATION_H_
 #define CHROMEOS_PRINTING_PRINTER_CONFIGURATION_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 18 matching lines @@
   struct PpdReference {
     // If non-empty, this is the url of a specific PPD the user has specified
     // for use with this printer.  The ppd can be gzipped or uncompressed.  This
     // url must use a file:// scheme.
     std::string user_supplied_ppd_url;
 
     // String that identifies which ppd to use from the ppd server.
     // Where possible, this is the same as the ipp/ldap
     // printer-make-and-model field.
     std::string effective_make_and_model;
+
+    // True if the printer should be auto-configured and a PPD is unnecessary.
+    bool autoconf = false;
   };
 
   // The location where the printer is stored.
   enum Source {
     SRC_USER_PREFS,
     SRC_POLICY,
   };
 
   // Constructs a printer object that is completely empty.
   Printer();
@@ skipping 78 matching lines @@
   // The datastore which holds this printer.
   Source source_;
 
   // Timestamp of most recent change.
   base::Time last_updated_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_PRINTING_PRINTER_CONFIGURATION_H_