ScopedPrinterInfoSetter on crash prone blocks.

printing/backend/print_backend_chromeos.cc

 // 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.
 
 #include "printing/backend/print_backend.h"
 
 #include "base/logging.h"
 
 namespace printing {
 
 // Provides a stubbed out PrintBackend implementation for use on ChromeOS.
 class PrintBackendChromeOS : public PrintBackend {
  public:
   PrintBackendChromeOS();
   virtual ~PrintBackendChromeOS() {}
 
   // PrintBackend implementation.
   virtual bool EnumeratePrinters(PrinterList* printer_list);
 
   virtual std::string GetDefaultPrinterName();
 
   virtual bool GetPrinterCapsAndDefaults(const std::string& printer_name,
                                          PrinterCapsAndDefaults* printer_info);
 
-  virtual bool GetPrinterDriverInfo(const std::string& printer_name,
-                                    std::string* driver_info);
+  virtual std::string GetPrinterDriverInfo(const std::string& printer_name);
 
   virtual bool IsValidPrinter(const std::string& printer_name);
 
  private:
 };
 
 PrintBackendChromeOS::PrintBackendChromeOS() {}
 
 bool PrintBackendChromeOS::EnumeratePrinters(PrinterList* printer_list) {
   return true;
 }
 
 
 
 bool PrintBackendChromeOS::GetPrinterCapsAndDefaults(
     const std::string& printer_name,
     PrinterCapsAndDefaults* printer_info) {
   NOTREACHED();
   return false;
 }
 
-bool PrintBackendChromeOS::GetPrinterDriverInfo(const std::string& printer_name,
-                                                std::string* driver_info) {
+std::string  PrintBackendChromeOS::GetPrinterDriverInfo(
+    const std::string& printer_name) {
   NOTREACHED();
   return false;
 }
 
 std::string PrintBackendChromeOS::GetDefaultPrinterName() {
   return std::string();
 }
 
 bool PrintBackendChromeOS::IsValidPrinter(const std::string& printer_name) {
   NOTREACHED();
   return true;
 }
 
 scoped_refptr<PrintBackend> PrintBackend::CreateInstance(
     const base::DictionaryValue* print_backend_settings) {
   return new PrintBackendChromeOS();
 }
 
 }  // namespace printing