importer: Convert two wstrings to string16 in GetFirefoxInstallPathFromRegistry().

chrome/browser/importer/firefox_importer_utils_win.cc

 // Copyright (c) 2011 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/importer/firefox_importer_utils.h"
 
 #include <shlobj.h>
 
 #include "base/file_util.h"
+#include "base/string16.h"
 #include "base/win/registry.h"
 
 // NOTE: Keep these in order since we need test all those paths according
 // to priority. For example. One machine has multiple users. One non-admin
 // user installs Firefox 2, which causes there is a Firefox2 entry under HKCU.
 // One admin user installs Firefox 3, which causes there is a Firefox 3 entry
 // under HKLM. So when the non-admin user log in, we should deal with Firefox 2
 // related data instead of Firefox 3.
 static const HKEY kFireFoxRegistryPaths[] = {
   HKEY_CURRENT_USER,
@@ skipping 15 matching lines @@
                                     &ver_buffer_length, NULL);
     if (result != ERROR_SUCCESS)
       continue;
     highest_version = std::max(highest_version, _wtoi(ver_buffer));
   }
   return highest_version;
 }
 
 FilePath GetFirefoxInstallPathFromRegistry() {
   // Detects the path that Firefox is installed in.
-  std::wstring registry_path = L"Software\\Mozilla\\Mozilla Firefox";
+  string16 registry_path = L"Software\\Mozilla\\Mozilla Firefox";
   wchar_t buffer[MAX_PATH];
   DWORD buffer_length = sizeof(buffer);
   base::win::RegKey reg_key(HKEY_LOCAL_MACHINE, registry_path.c_str(),
                             KEY_READ);
   LONG result = reg_key.ReadValue(L"CurrentVersion", buffer,
                                   &buffer_length, NULL);
   if (result != ERROR_SUCCESS)
     return FilePath();
 
-  registry_path += L"\\" + std::wstring(buffer) + L"\\Main";
+  registry_path += L"\\" + string16(buffer) + L"\\Main";
   buffer_length = sizeof(buffer);
   base::win::RegKey reg_key_directory(HKEY_LOCAL_MACHINE,
                                       registry_path.c_str(), KEY_READ);
   result = reg_key_directory.ReadValue(L"Install Directory", buffer,
                                        &buffer_length, NULL);
 
   return (result != ERROR_SUCCESS) ? FilePath() : FilePath(buffer);
 }
 
 FilePath GetProfilesINI() {
   FilePath ini_file;
   // The default location of the profile folder containing user data is
   // under the "Application Data" folder in Windows XP.
   wchar_t buffer[MAX_PATH] = {0};
   if (SUCCEEDED(SHGetFolderPath(NULL, CSIDL_APPDATA, NULL,
                                 SHGFP_TYPE_CURRENT, buffer))) {
     ini_file = FilePath(buffer).Append(L"Mozilla\\Firefox\\profiles.ini");
   }
   if (file_util::PathExists(ini_file))
     return ini_file;
 
   return FilePath();
 }