Broadcast NotifyTimezoneChange to all RenderProcessHosts when the system time zone changes

content/browser/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 "chromeos/settings/timezone_settings.h"
+
+namespace content {
+
+class TimeZoneMonitorChromeOS
+    : public TimeZoneMonitor,
+      public chromeos::system::TimezoneSettings::Observer {
+ public:
+  TimeZoneMonitorChromeOS() : TimeZoneMonitor() {
+    chromeos::system::TimezoneSettings::GetInstance()->AddObserver(this);
+  }
+
+  virtual ~TimeZoneMonitorChromeOS() {
+    chromeos::system::TimezoneSettings::GetInstance()->RemoveObserver(this);
+  }
+
+  // chromeos::system::TimezoneSettings::Observer implementation.
+  virtual void TimezoneChanged(const icu::TimeZone& time_zone) OVERRIDE {
+    NotifyRenderers();
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TimeZoneMonitorChromeOS);
+};
+
+// static
+scoped_ptr<TimeZoneMonitor> TimeZoneMonitor::Create() {
+  return scoped_ptr<TimeZoneMonitor>(new TimeZoneMonitorChromeOS());
+}
+
+}  // namespace content