chromeos: Switch --first-boot to --first-exec-after-boot.

chrome/browser/chromeos/login/user_manager_impl.cc

 // Copyright (c) 2013 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/browser/chromeos/login/user_manager_impl.h"
 
 #include <cstddef>
 #include <set>
 
 #include "base/bind.h"
@@ skipping 1778 matching lines @@
                                       true,           // has_active_session
                                       this);
   } else {
     RestorePendingUserSessions();
   }
 }
 
 void UserManagerImpl::SendRegularUserLoginMetrics(const std::string& email) {
   // If this isn't the first time Chrome was run after the system booted,
   // assume that Chrome was restarted because a previous session ended.
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kFirstBoot)) {
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kFirstExecAfterBoot)) {
     const std::string last_email =
         g_browser_process->local_state()->GetString(kLastLoggedInRegularUser);
     const base::TimeDelta time_to_login =
         base::TimeTicks::Now() - manager_creation_time_;
     if (!last_email.empty() && email != last_email &&
         time_to_login.InSeconds() <= kLogoutToLoginDelayMaxSec) {
       UMA_HISTOGRAM_CUSTOM_COUNTS("UserManager.LogoutToLoginDelay",
           time_to_login.InSeconds(), 0, kLogoutToLoginDelayMaxSec, 50);
     }
   }
 }
 
 }  // namespace chromeos