printing: Add out-of-line copy ctors for complex classes.

printing/backend/print_backend.cc

 // Copyright (c) 2012 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.
 
 #include "printing/backend/print_backend.h"
 
 namespace printing {
 
 PrinterBasicInfo::PrinterBasicInfo()
     : printer_status(0),
       is_default(false) {}
 
+PrinterBasicInfo::PrinterBasicInfo(const PrinterBasicInfo& other) = default;
+
 PrinterBasicInfo::~PrinterBasicInfo() {}
 
 PrinterSemanticCapsAndDefaults::PrinterSemanticCapsAndDefaults()
     : collate_capable(false),
       collate_default(false),
       copies_capable(false),
       duplex_capable(false),
       duplex_default(UNKNOWN_DUPLEX_MODE),
       color_changeable(false),
       color_default(false),
       color_model(UNKNOWN_COLOR_MODEL),
       bw_model(UNKNOWN_COLOR_MODEL)
 {}
 
 PrinterSemanticCapsAndDefaults::~PrinterSemanticCapsAndDefaults() {}
 
 PrinterCapsAndDefaults::PrinterCapsAndDefaults() {}
 
+PrinterCapsAndDefaults::PrinterCapsAndDefaults(
+    const PrinterCapsAndDefaults& other) = default;
+
 PrinterCapsAndDefaults::~PrinterCapsAndDefaults() {}
 
 PrintBackend::~PrintBackend() {}
 
 }  // namespace printing