Fixed a crash with some HP printer drivers (when invoking PTGetPrintCapabilit...

printing/backend/print_backend_win.cc

 // 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.
 
 #include "printing/backend/print_backend.h"
 
 #include <objidl.h>
 #include <winspool.h>
 
 #include "base/scoped_ptr.h"
@@ skipping 67 matching lines @@
         info.options[kDriverNameTagName] =
             WideToUTF8(printer_info[index].pDriverName);
       printer_list->push_back(info);
     }
   }
 }
 
 bool PrintBackendWin::GetPrinterCapsAndDefaults(
     const std::string& printer_name,
     PrinterCapsAndDefaults* printer_info) {
-  if (!XPSModule::Init()) {
+  ScopedXPSInitializer xps_initializer;
+  if (!xps_initializer.initialized()) {
     // TODO(sanjeevr): Handle legacy proxy case (with no prntvpt.dll)
     return false;
   }
   if (!IsValidPrinter(printer_name)) {
     return false;
   }
   DCHECK(printer_info);
   HPTPROVIDER provider = NULL;
   std::wstring printer_name_wide = UTF8ToWide(printer_name);
   HRESULT hr = XPSModule::OpenProvider(printer_name_wide, 1, &provider);
@@ skipping 71 matching lines @@
   }
   return ret;
 }
 
 scoped_refptr<PrintBackend> PrintBackend::CreateInstance(
     const DictionaryValue* print_backend_settings) {
   return new PrintBackendWin;
 }
 
 }  // namespace printing