Remove stale code to delete the metro user data dir. It never shipped.

chrome/installer/util/install_util.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.
 //
 // See the corresponding header file for description of the functions in this
 // file.
 
 #include "chrome/installer/util/install_util.h"
 
 #include <shellapi.h>
@@ skipping 396 matching lines @@
   base::FilePath user_data_dir;
   return !PathService::Get(chrome::DIR_USER_DATA, &user_data_dir) ||
          base::PathExists(user_data_dir.Append(chrome::kFirstRunSentinel));
 }
 
 // static
 bool InstallUtil::GetSentinelFilePath(const base::FilePath::CharType* file,
                                       BrowserDistribution* dist,
                                       base::FilePath* path) {
   // TODO(msw): Use PathService to obtain the correct DIR_USER_DATA.
-  std::vector<base::FilePath> user_data_dir_paths;
-  installer::GetChromeUserDataPaths(dist, &user_data_dir_paths);
+  base::FilePath user_data_dir(installer::GetChromeUserDataPath(dist));
 
-  if (user_data_dir_paths.empty())
+  if (user_data_dir.empty())
     return false;
-  *path = user_data_dir_paths[0].Append(file);
+  *path = user_data_dir.Append(file);
   return true;
 }
 
 // This method tries to delete a registry key and logs an error message
 // in case of failure. It returns true if deletion is successful (or the key did
 // not exist), otherwise false.
 bool InstallUtil::DeleteRegistryKey(HKEY root_key,
                                     const base::string16& key_path) {
   VLOG(1) << "Deleting registry key " << key_path;
   LONG result = ::SHDeleteKey(root_key, key_path.c_str());
@@ skipping 177 matching lines @@
   // Open the program and see if it references the expected file.
   base::File file;
   BY_HANDLE_FILE_INFORMATION info = {};
 
   return (OpenForInfo(path, &file) &&
           GetInfo(file, &info) &&
           info.dwVolumeSerialNumber == file_info_.dwVolumeSerialNumber &&
           info.nFileIndexHigh == file_info_.nFileIndexHigh &&
           info.nFileIndexLow == file_info_.nFileIndexLow);
 }