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

printing/backend/print_backend.h

 // 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.
 
 #ifndef PRINTING_BACKEND_PRINT_BACKEND_H_
 #define PRINTING_BACKEND_PRINT_BACKEND_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "printing/print_job_constants.h"
 #include "printing/printing_export.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 // This is the interface for platform-specific code for a print backend
 namespace printing {
 
 struct PRINTING_EXPORT PrinterBasicInfo {
   PrinterBasicInfo();
+  PrinterBasicInfo(const PrinterBasicInfo& other);
   ~PrinterBasicInfo();
 
   std::string printer_name;
   std::string printer_description;
   int printer_status;
   int is_default;
   std::map<std::string, std::string> options;
 };
 
 typedef std::vector<PrinterBasicInfo> PrinterList;
@@ skipping 22 matching lines @@
   };
   std::vector<Paper> papers;
   Paper default_paper;
 
   std::vector<gfx::Size> dpis;
   gfx::Size default_dpi;
 };
 
 struct PRINTING_EXPORT PrinterCapsAndDefaults {
   PrinterCapsAndDefaults();
+  PrinterCapsAndDefaults(const PrinterCapsAndDefaults& other);
   ~PrinterCapsAndDefaults();
 
   std::string printer_capabilities;
   std::string caps_mime_type;
   std::string printer_defaults;
   std::string defaults_mime_type;
 };
 
 // PrintBackend class will provide interface for different print backends
 // (Windows, CUPS) to implement. User will call CreateInstance() to
@@ skipping 37 matching lines @@
       const base::DictionaryValue* print_backend_settings);
 
  protected:
   friend class base::RefCountedThreadSafe<PrintBackend>;
   virtual ~PrintBackend();
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_BACKEND_PRINT_BACKEND_H_