chromeos: Convert system tray session length limit to mojo

chrome/browser/ui/ash/system_tray_delegate_chromeos.h

 // Copyright 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.
 
 #ifndef CHROME_BROWSER_UI_ASH_SYSTEM_TRAY_DELEGATE_CHROMEOS_H_
 #define CHROME_BROWSER_UI_ASH_SYSTEM_TRAY_DELEGATE_CHROMEOS_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 35 matching lines @@
   ~SystemTrayDelegateChromeOS() override;
 
   // Overridden from ash::SystemTrayDelegate:
   void Initialize() override;
   void ShowUserLogin() override;
   void GetCurrentIME(ash::IMEInfo* info) override;
   void GetAvailableIMEList(ash::IMEInfoList* list) override;
   void GetCurrentIMEProperties(ash::IMEPropertyInfoList* list) override;
   base::string16 GetIMEManagedMessage() override;
   ash::NetworkingConfigDelegate* GetNetworkingConfigDelegate() const override;
-  bool GetSessionStartTime(base::TimeTicks* session_start_time) override;
-  bool GetSessionLengthLimit(base::TimeDelta* session_length_limit) override;
   void ActiveUserWasChanged() override;
   bool IsSearchKeyMappedToCapsLock() override;
 
  private:
   ash::SystemTrayNotifier* GetSystemTrayNotifier();
 
   void SetProfile(Profile* profile);
 
   bool UnsetProfile(Profile* profile);
 
@@ skipping 43 matching lines @@
 
   // input_method::InputMethodManager::ImeMenuObserver:
   void ImeMenuActivationChanged(bool is_active) override;
   void ImeMenuListChanged() override;
   void ImeMenuItemsChanged(
       const std::string& engine_id,
       const std::vector<input_method::InputMethodManager::MenuItem>& items)
       override;
 
   std::unique_ptr<content::NotificationRegistrar> registrar_;
-  std::unique_ptr<PrefChangeRegistrar> local_state_registrar_;
   std::unique_ptr<PrefChangeRegistrar> user_pref_registrar_;
   Profile* user_profile_ = nullptr;
   int search_key_mapped_to_ = input_method::kSearchKey;
-  bool have_session_start_time_ = false;
-  base::TimeTicks session_start_time_;
-  bool have_session_length_limit_ = false;
-  base::TimeDelta session_length_limit_;
-  bool session_started_ = false;
 
   std::unique_ptr<ash::NetworkingConfigDelegate> networking_config_delegate_;
   std::unique_ptr<AccessibilityStatusSubscription> accessibility_subscription_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemTrayDelegateChromeOS);
 };
 
 ash::SystemTrayDelegate* CreateSystemTrayDelegate();
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_ASH_SYSTEM_TRAY_DELEGATE_CHROMEOS_H_