Enable copy and assignment for 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 20 matching lines @@
     // Otherwise, the file was saved to disk by the user.
     bool from_quirks_server = false;
   };
 
   // Constructs a printer object that is completely empty.
   Printer();
 
   // Constructs a printer object with an id.
   explicit Printer(const std::string& id);
 
+  // Copy constructor and assignment.
+  explicit Printer(const Printer& printer);
+  Printer& operator=(const Printer& printer);
+
   ~Printer();
 
   const std::string& id() const { return id_; }
   void set_id(const std::string& id) { id_ = id; }
 
   const std::string& display_name() const { return display_name_; }
   void set_display_name(const std::string& display_name) {
     display_name_ = display_name;
   }
 
@@ skipping 37 matching lines @@
 
   // The full path for the printer. Suitable for configuration in CUPS.
   // Contains protocol, hostname, port, and queue.
   std::string uri_;
 
   // The associated postscript printer description.
   PPDFile ppd_;
 
   // The UUID from an autoconf protocol for deduplication. Could be empty.
   std::string uuid_;
-
-  DISALLOW_COPY_AND_ASSIGN(Printer);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_PRINTING_PRINTER_CONFIGURATION_H_