Delete both regular and Metro user data dirs on uninstall.

chrome/installer/util/auto_launch_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.
 
 #include "chrome/installer/util/auto_launch_util.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/path_service.h"
@@ skipping 32 matching lines @@
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   if (command_line.HasSwitch(switches::kUserDataDir)) {
     path = command_line.GetSwitchValuePath(switches::kUserDataDir);
   } else {
     // Get the path from the same source as the installer, to make sure there
     // are no differences.
     BrowserDistribution* distribution =
         BrowserDistribution::GetSpecificDistribution(
             BrowserDistribution::CHROME_BROWSER);
     installer::Product product(distribution);
-    path = product.GetUserDataPath();
+    std::vector<FilePath> data_dir_paths;
+    product.GetUserDataPaths(&data_dir_paths);
+    if (!data_dir_paths.empty())
+      path = data_dir_paths[0];
   }
   path = path.Append(profile_directory);
 
   std::string input(path.AsUTF8Unsafe());
   uint8 hash[16];
   crypto::SHA256HashString(input, hash, sizeof(hash));
   std::string hash_string = base::HexEncode(hash, sizeof(hash));
   return string16(kAutolaunchKeyValue) +
       ASCIIToWide("_") + ASCIIToWide(hash_string);
 }
@@ skipping 179 matching lines @@
 }
 
 void DisableBackgroundStartAtLogin() {
   SetWillLaunchAtLogin(FilePath(),
                        ASCIIToUTF16(chrome::kInitialProfile),
                        FLAG_PRESERVE,
                        FLAG_DISABLE);
 }
 
 }  // namespace auto_launch_util