Add explicit base namespace to string16 users.

chrome/common/importer/firefox_importer_utils_win.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 "chrome/common/importer/firefox_importer_utils.h"
 
 #include <shlobj.h>
 
 #include "base/file_util.h"
 #include "base/path_service.h"
@@ skipping 29 matching lines @@
                                     &ver_buffer_length, NULL);
     if (result != ERROR_SUCCESS)
       continue;
     highest_version = std::max(highest_version, _wtoi(ver_buffer));
   }
   return highest_version;
 }
 
 base::FilePath GetFirefoxInstallPathFromRegistry() {
   // Detects the path that Firefox is installed in.
-  string16 registry_path = kFirefoxPath;
+  base::string16 registry_path = kFirefoxPath;
   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(kCurrentVersion, buffer,
                                   &buffer_length, NULL);
   if (result != ERROR_SUCCESS)
     return base::FilePath();
 
-  registry_path += L"\\" + string16(buffer) + L"\\Main";
+  registry_path += L"\\" + base::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) ? base::FilePath() : base::FilePath(buffer);
 }
 
 base::FilePath GetProfilesINI() {
   base::FilePath ini_file;
   // The default location of the profile folder containing user data is
   // under the "Application Data" folder in Windows XP, Vista, and 7.
   if (!PathService::Get(base::DIR_APP_DATA, &ini_file))
     return base::FilePath();
 
   ini_file = ini_file.AppendASCII("Mozilla");
   ini_file = ini_file.AppendASCII("Firefox");
   ini_file = ini_file.AppendASCII("profiles.ini");
 
   return base::PathExists(ini_file) ? ini_file : base::FilePath();
 }