Restart Chrome on ChromeOS as early as possible to speed up restart.

chrome/browser/chromeos/login/login_utils.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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_UTILS_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_UTILS_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 71 matching lines @@
   // Before WebUI login (Up to R14) the caller owned the returned
   // Authenticator instance and had to delete it when done.
   // New instance was created on each new login attempt.
   // Starting with WebUI login (R15) single Authenticator instance is used for
   // entire login process, even for multiple retries. Authenticator instance
   // holds reference to login profile and is later used during fetching of
   // OAuth tokens.
   // TODO(nkostylev): Cleanup after WebUI login migration is complete.
   virtual scoped_refptr<Authenticator> CreateAuthenticator(
       LoginStatusConsumer* consumer) = 0;
+
+  // Initiates process restart if needed.
+  // |early_restart| is true if this restart attempt happens before user profile
+  // is fully initialized.
+  // Might not return if restart is possible right now.
+  // Returns true if restart was scheduled.
+  // Returns false if no restart is needed,
+  virtual bool RestartToApplyPerSessionFlagsIfNeed(Profile* profile,
+                                                   bool early_restart) = 0;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_UTILS_H_