[TimeZoneMonitor] Decouple //content/browser/time_zone_monitor* to //device/.

device/time_zone_monitor/time_zone_monitor_chromeos.cc

 // 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.
 
-#include "content/browser/time_zone_monitor.h"
+#include "device/time_zone_monitor/time_zone_monitor.h"
 
 #include "base/macros.h"
 #include "chromeos/settings/timezone_settings.h"
 
-namespace content {
+namespace device {
 
 class TimeZoneMonitorChromeOS
     : public TimeZoneMonitor,
       public chromeos::system::TimezoneSettings::Observer {
  public:
   TimeZoneMonitorChromeOS() : TimeZoneMonitor() {
     chromeos::system::TimezoneSettings::GetInstance()->AddObserver(this);
   }
 
   ~TimeZoneMonitorChromeOS() override {
     chromeos::system::TimezoneSettings::GetInstance()->RemoveObserver(this);
   }
 
   // chromeos::system::TimezoneSettings::Observer implementation.
   void TimezoneChanged(const icu::TimeZone& time_zone) override {
     NotifyClients();
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TimeZoneMonitorChromeOS);
 };
 
 // static
 std::unique_ptr<TimeZoneMonitor> TimeZoneMonitor::Create(
     scoped_refptr<base::SequencedTaskRunner> file_task_runner) {
   return std::unique_ptr<TimeZoneMonitor>(new TimeZoneMonitorChromeOS());
 }
 
-}  // namespace content
+}  // namespace device