Added support to the Windows cloud print proxy to print XPS documents directl...

chrome/service/cloud_print/print_system.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_PRINT_SYSTEM_H_
 #define CHROME_SERVICE_CLOUD_PRINT_PRINT_SYSTEM_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 167 matching lines @@
                              PlatformJobId job_id,
                              PrintJobDetails *job_details) = 0;
 
   // Factory methods to create corresponding watcher. Callee is responsible
   // for deleting objects. Return NULL if failed.
   virtual PrintServerWatcher* CreatePrintServerWatcher() = 0;
   virtual PrinterWatcher* CreatePrinterWatcher(
       const std::string& printer_name) = 0;
   virtual JobSpooler* CreateJobSpooler() = 0;
 
+  // Returns a comma separated list of mimetypes for print data that are
+  // supported by this print system. The format of this string is the same as
+  // that used for the HTTP Accept: header.
+  virtual std::string GetSupportedMimeTypes() = 0;
+
   // Generate unique for proxy.
   static std::string GenerateProxyId();
 
   // Call this function to obtain printing system for specified print server.
   // If print settings are NULL, default settings will be used.
   // Return NULL if no print system available.
   static scoped_refptr<PrintSystem> CreateInstance(
       const DictionaryValue* print_system_settings);
 };
 
 
 // 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 PrintSystem::PrintServerWatcher::Delegate PrintServerWatcherDelegate;
 typedef PrintSystem::PrinterWatcher::Delegate PrinterWatcherDelegate;
 typedef PrintSystem::JobSpooler::Delegate JobSpoolerDelegate;
 
 }  // namespace cloud_print
 
 #endif  // CHROME_SERVICE_CLOUD_PRINT_PRINT_SYSTEM_H_