Implements the dialog view for logout button tray in public sessions.

chrome/browser/chromeos/system/ash_system_tray_delegate.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/browser/chromeos/system/ash_system_tray_delegate.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 843 matching lines @@
                    base::Unretained(this)));
     user_pref_registrar_->Add(
         prefs::kLanguageRemapSearchKeyTo,
         base::Bind(&SystemTrayDelegate::OnLanguageRemapSearchKeyToChanged,
                    base::Unretained(this)));
     user_pref_registrar_->Add(
         prefs::kShowLogoutButtonInTray,
         base::Bind(&SystemTrayDelegate::UpdateShowLogoutButtonInTray,
                    base::Unretained(this)));
     user_pref_registrar_->Add(
+        prefs::kLogoutDialogDurationMs,
+        base::Bind(&SystemTrayDelegate::UpdateLogoutDialogDuration,
+                   base::Unretained(this)));
+    user_pref_registrar_->Add(
         prefs::kLargeCursorEnabled,
         base::Bind(&SystemTrayDelegate::OnAccessibilityModeChanged,
                    base::Unretained(this),
                    ash::A11Y_NOTIFICATION_NONE));
     user_pref_registrar_->Add(
         prefs::kShouldAlwaysShowAccessibilityMenu,
         base::Bind(&SystemTrayDelegate::OnAccessibilityModeChanged,
                    base::Unretained(this),
                    ash::A11Y_NOTIFICATION_NONE));
     user_pref_registrar_->Add(
         prefs::kPerformanceTracingEnabled,
         base::Bind(&SystemTrayDelegate::UpdatePerformanceTracing,
                    base::Unretained(this)));
 
     UpdateClockType();
     UpdateShowLogoutButtonInTray();
+    UpdateLogoutDialogDuration();
     UpdatePerformanceTracing();
     search_key_mapped_to_ =
         profile->GetPrefs()->GetInteger(prefs::kLanguageRemapSearchKeyTo);
   }
 
   bool UnsetProfile(Profile* profile) {
     if (profile != user_profile_)
       return false;
     user_pref_registrar_.reset();
     return true;
@@ skipping 51 matching lines @@
     if (chromeos::UserManager::Get()->IsCurrentUserOwner())
       CrosSettings::Get()->SetBoolean(kSystemUse24HourClock, use_24_hour_clock);
   }
 
   void UpdateShowLogoutButtonInTray() {
     GetSystemTrayNotifier()->NotifyShowLoginButtonChanged(
         user_pref_registrar_->prefs()->GetBoolean(
             prefs::kShowLogoutButtonInTray));
   }
 
+  void UpdateLogoutDialogDuration() {
+    GetSystemTrayNotifier()->NotifyLogoutDialogDurationChanged(
+        user_pref_registrar_->prefs()->GetInteger(

[bartfab (slow), 2013/12/03 19:46:04]

Nit: Why not convert to base::TimeDelta() here? You have to do the conversion
somewhere - best do it as early as possible so the value you pass around is as
unambiguous as possible.

[binjin, 2013/12/04 10:47:03]

Done.

+            prefs::kLogoutDialogDurationMs));
+  }
+
   void UpdateSessionStartTime() {
     const PrefService* local_state = local_state_registrar_->prefs();
     if (local_state->HasPrefPath(prefs::kSessionStartTime)) {
       have_session_start_time_ = true;
       session_start_time_ = base::TimeTicks::FromInternalValue(
           local_state->GetInt64(prefs::kSessionStartTime));
     } else {
       have_session_start_time_ = false;
       session_start_time_ = base::TimeTicks();
     }
@@ skipping 253 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(SystemTrayDelegate);
 };
 
 }  // namespace
 
 ash::SystemTrayDelegate* CreateSystemTrayDelegate() {
   return new chromeos::SystemTrayDelegate();
 }
 
 }  // namespace chromeos