Add title property to chrome.printerProvider pritn job

chrome/browser/ui/webui/print_preview/extension_printer_handler.cc

 // Copyright 2015 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 "chrome/browser/ui/webui/print_preview/extension_printer_handler.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 90 matching lines @@
       ->GetForBrowserContext(browser_context_)
       ->DispatchGetCapabilityRequested(
           destination_id,
           base::Bind(&ExtensionPrinterHandler::WrapGetCapabilityCallback,
                      weak_ptr_factory_.GetWeakPtr(), callback, destination_id));
 }
 
 void ExtensionPrinterHandler::StartPrint(
     const std::string& destination_id,
     const std::string& capability,
+    const base::string16& job_title,
     const std::string& ticket_json,
     const gfx::Size& page_size,
     const scoped_refptr<base::RefCountedMemory>& print_data,
     const PrinterHandler::PrintCallback& callback) {
   scoped_ptr<extensions::PrinterProviderPrintJob> print_job(
       new extensions::PrinterProviderPrintJob());
   print_job->printer_id = destination_id;
+  print_job->job_title = job_title;
   print_job->ticket_json = ticket_json;
 
   cloud_devices::CloudDeviceDescription printer_description;
   printer_description.InitFromString(capability);
 
   cloud_devices::printer::ContentTypesCapability content_types;
   content_types.LoadFrom(printer_description);
 
   const bool kUsePdf = content_types.Contains(kContentTypePdf) ||
                        content_types.Contains(kContentTypeAll);
@@ skipping 71 matching lines @@
     const base::DictionaryValue& capability) {
   callback.Run(destination_id, capability);
 }
 
 void ExtensionPrinterHandler::WrapPrintCallback(
     const PrinterHandler::PrintCallback& callback,
     bool success,
     const std::string& status) {
   callback.Run(success, status);
 }