As the first step in an effort to improve robustness of the cloud print proxy...

chrome/service/cloud_print/printer_job_handler.h

 // Copyright (c) 2010 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 CHROME_SERVICE_CLOUD_PRINT_PRINTER_JOB_HANDLER_H_
 #define CHROME_SERVICE_CLOUD_PRINT_PRINTER_JOB_HANDLER_H_
 #pragma once
 
 #include <list>
 #include <string>
@@ skipping 212 matching lines @@
   // Sets the next response handler to the specifed data handler.
   void SetNextDataHandler(DataHandler handler);
 
   void JobFailed(PrintJobError error);
   void JobSpooled(cloud_print::PlatformJobId local_job_id);
   // Returns false if printer info is up to date and no updating is needed.
   bool UpdatePrinterInfo();
   bool HavePendingTasks();
   void FailedFetchingJobData();
 
+  // Callback that asynchronously receives printer caps and defaults.
+  void OnReceivePrinterCaps(
+    bool succeeded,
+    const std::string& printer_name,
+    const printing::PrinterCapsAndDefaults& caps_and_defaults);
+
   // Called on print_thread_.
   void DoPrint(const JobDetails& job_details,
                const std::string& printer_name);
 
   scoped_refptr<CloudPrintURLFetcher> request_;
   scoped_refptr<cloud_print::PrintSystem> print_system_;
   printing::PrinterBasicInfo printer_info_;
   PrinterInfoFromCloud printer_info_cloud_;
   std::string auth_token_;
   GURL cloud_print_server_url_;
@@ skipping 42 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(PrinterJobHandler);
 };
 
 // This typedef is to workaround the issue with certain versions of
 // Visual Studio where it gets confused between multiple Delegate
 // classes and gives a C2500 error. (I saw this error on the try bots -
 // the workaround was not needed for my machine).
 typedef PrinterJobHandler::Delegate PrinterJobHandlerDelegate;
 
 #endif  // CHROME_SERVICE_CLOUD_PRINT_PRINTER_JOB_HANDLER_H_