Split SystemAccess into TimezoneSettings, StatisticsProvider, and SyslogsProvider.

chrome/browser/chromeos/system_access.h

-// Copyright (c) 2011 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_SYSTEM_ACCESS_H_
-#define CHROME_BROWSER_CHROMEOS_SYSTEM_ACCESS_H_
-#pragma once
-
-#include <string>
-
-#include "base/callback_old.h"
-#include "content/browser/cancelable_request.h"
-#include "unicode/timezone.h"
-
-class CancelableRequestConsumerBase;
-
-namespace chromeos {
-
-typedef std::map<std::string, std::string> LogDictionaryType;
-
-// This interface provides access to Chrome OS system APIs such as the
-// timezone setting.
-class SystemAccess : public CancelableRequestProvider {
- public:
-  class Observer {
-   public:
-    // Called when the timezone has changed. |timezone| is non-null.
-    virtual void TimezoneChanged(const icu::TimeZone& timezone) = 0;
-  };
-
-  static SystemAccess* GetInstance();
-
-  // Returns the current timezone as an icu::Timezone object.
-  virtual const icu::TimeZone& GetTimezone() = 0;
-
-  // Sets the current timezone. |timezone| must be non-null.
-  virtual void SetTimezone(const icu::TimeZone& timezone) = 0;
-
-  // Retrieve the named machine statistic (e.g. "hardware_class").
-  // This does not update the statistcs. If the |name| is not set, |result|
-  // preserves old value.
-  virtual bool GetMachineStatistic(const std::string& name,
-                                   std::string* result) = 0;
-
-  // The callback type used with RequestSyslogs().
-  typedef Callback2<LogDictionaryType*,
-                    std::string*>::Type ReadCompleteCallback;
-
-  // Used to specify the syslogs context with RequestSyslogs().
-  enum SyslogsContext {
-    SYSLOGS_FEEDBACK,
-    SYSLOGS_SYSINFO,
-    SYSLOGS_NETWORK,
-    SYSLOGS_DEFAULT
-  };
-
-  // Request system logs. Read happens on the FILE thread and callback is
-  // called on the thread this is called from (via ForwardResult).
-  // Logs are owned by callback function (use delete when done with them).
-  // Returns the request handle. Call CancelRequest(Handle) to cancel
-  // the request before the callback gets called.
-  virtual Handle RequestSyslogs(
-      bool compress_logs,
-      SyslogsContext context,
-      CancelableRequestConsumerBase* consumer,
-      ReadCompleteCallback* callback) = 0;
-
-  // The observer is used to monitor timezone changes.
-  virtual void AddObserver(Observer* observer) = 0;
-  virtual void RemoveObserver(Observer* observer) = 0;
-
- protected:
-  virtual ~SystemAccess() {}
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_SYSTEM_ACCESS_H_