Fixed return value.

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 {
 
@@ skipping 26 matching lines @@
 
 
 
 bool PrintBackendChromeOS::GetPrinterCapsAndDefaults(
     const std::string& printer_name,
     PrinterCapsAndDefaults* printer_info) {
   NOTREACHED();
   return false;
 }
 
-std::string  PrintBackendChromeOS::GetPrinterDriverInfo(
+std::string PrintBackendChromeOS::GetPrinterDriverInfo(
     const std::string& printer_name) {
   NOTREACHED();
-  return false;
+  return std::string();
 }
 
 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