Use multi-profile mount point by default after browser crash and in Guest session.

chrome/common/chrome_constants.h

 // 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.
 
 // A handful of resource-like constants related to the Chrome application.
 
 #ifndef CHROME_COMMON_CHROME_CONSTANTS_H_
 #define CHROME_COMMON_CHROME_CONSTANTS_H_
 
 #include "base/files/file_path.h"
@@ skipping 125 matching lines @@
 // stored in a subkey named with the version number of the build. Each value
 // under the subkey represents an additional attempt.
 extern const wchar_t kBrowserCrashDumpAttemptsRegistryPath[];
 #endif
 
 #if defined(OS_CHROMEOS)
 // Chrome OS profile directories have custom prefix.
 // Profile path format: [user_data_dir]/u-[$hash]
 // Ex.: /home/chronos/u-0123456789
 extern const char kProfileDirPrefix[];
+
+// Legacy profile dir that was used when only one cryptohome has been mounted.
+extern const char kLegacyProfileDir[];
+
+// This must be kept in sync with TestingProfile::kTestUserProfileDir.
+extern const char kTestUserProfileDir[];
 #endif
 
 // Used to identify the application to the system AV function in Windows.
 extern const char kApplicationClientIDStringForAVScanning[];
 
 }  // namespace chrome
 
 #endif  // CHROME_COMMON_CHROME_CONSTANTS_H_