Date and Time dialog for when the clock isn't synced.

chrome/browser/ui/webui/options/chromeos/date_time_options_handler.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_UI_WEBUI_OPTIONS_CHROMEOS_DATE_TIME_OPTIONS_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_DATE_TIME_OPTIONS_HANDLER_H_
+
+#include "base/compiler_specific.h"
+#include "chrome/browser/ui/webui/options/options_ui.h"
+#include "chromeos/dbus/system_clock_client.h"
+
+namespace chromeos {
+namespace options {
+
+// Chrome OS handler for the set date/time link in the Advanced settings page.
+class DateTimeOptionsHandler : public ::options::OptionsPageUIHandler,
+                               public SystemClockClient::Observer {
+ public:
+  DateTimeOptionsHandler();
+  virtual ~DateTimeOptionsHandler();
+
+  // OptionsPageUIHandler:
+  virtual void RegisterMessages() OVERRIDE;
+  virtual void GetLocalizedValues(
+      base::DictionaryValue* localized_strings) OVERRIDE;
+  virtual void InitializeHandler() OVERRIDE;
+  virtual void InitializePage() OVERRIDE;
+
+ private:
+  // SystemClockClient::Observer:
+  virtual void SystemClockCanSetTimeChanged(bool can_set_time) OVERRIDE;

[Dan Beam, 2014/04/23 17:51:45]

nit: there is a school of folks that don't bother putting base class methods in
private: sections when deriving.  this is because callers can do:

  static_cast<Base*>(derived)->PrivateMethod()

but either way this is popular in chrome code (I don't understand why but my C++
fu isn't great)

+
+  // Callback for showing the set time dialog from the settings page.

[Dan Beam, 2014/04/23 17:51:45]

please mention which arguments this handler expect and the exact message name
(e.g.  Callback for the "showSetTime" message)

[michaelpg, 2014/04/24 01:32:23]

Done.

+  void HandleShowSetTime(const base::ListValue* args);
+
+  // Only expose the button and dialog of the system time can be set.
+  bool can_set_time_;
+  bool page_initialized_;
+
+  DISALLOW_COPY_AND_ASSIGN(DateTimeOptionsHandler);
+};
+
+}  // namespace options
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_DATE_TIME_OPTIONS_HANDLER_H_