ChromeOS: Implement periodic timezone refresh on geolocation data.

chrome/browser/chromeos/login/ui/login_display_host_impl.h

 // Copyright 2014 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_UI_LOGIN_DISPLAY_HOST_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 85 matching lines @@
   OobeUI* GetOobeUI() const;
 
   const gfx::Rect& background_bounds() const { return background_bounds_; }
 
   // Trace id for ShowLoginWebUI event (since there exists at most one login
   // WebUI at a time).
   static const int kShowLoginWebUIid;
 
   views::Widget* login_window_for_test() { return login_window_; }
 
+  void StartTimeZoneResolve();
+
  protected:
   // content::NotificationObserver implementation:
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   // Overridden from content::WebContentsObserver:
   void RenderProcessGone(base::TerminationStatus status) override;
 
   // Overridden from chromeos::SessionManagerClient::Observer:
@@ skipping 189 matching lines @@
 
   base::WeakPtrFactory<LoginDisplayHostImpl> pointer_factory_;
   base::WeakPtrFactory<LoginDisplayHostImpl> animation_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginDisplayHostImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_IMPL_H_