Refactor MetricsLogChromeOS to ChromeOSMetricsProvider.

chrome/browser/metrics/metrics_log_chromeos.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_METRICS_METRICS_LOG_CHROMEOS_H_
-#define CHROME_BROWSER_METRICS_METRICS_LOG_CHROMEOS_H_
-
-#include "chrome/browser/metrics/perf_provider_chromeos.h"
-
-namespace device {
-class BluetoothAdapter;
-}
-
-namespace metrics {
-class ChromeUserMetricsExtension;
-}
-
-class PrefService;
-
-// Performs ChromeOS specific metrics logging.
-class MetricsLogChromeOS {
- public:
-  explicit MetricsLogChromeOS(metrics::ChromeUserMetricsExtension* uma_proto);
-  virtual ~MetricsLogChromeOS();
-
-  // Logs ChromeOS specific metrics which don't need to be updated immediately.
-  void LogChromeOSMetrics();
-
-  // Within the stability group, write ChromeOS specific attributes that need to
-  // be updated asap and can't be delayed until the user decides to restart
-  // chromium.  Delaying these stats would bias metrics away from happy long
-  // lived chromium processes (ones that don't crash, and keep on running).
-  void WriteRealtimeStabilityAttributes(PrefService* pref);
-
- private:
-  // Update the number of users logged into a multi-profile session.
-  // If the number of users change while the log is open, the call invalidates
-  // the user count value.
-  void UpdateMultiProfileUserCount();
-
-  // Sets the Bluetooth Adapter instance used for the WriteBluetoothProto()
-  // call.
-  void SetBluetoothAdapter(scoped_refptr<device::BluetoothAdapter> adapter);
-
-  // Writes info about paired Bluetooth devices on this system.
-  virtual void WriteBluetoothProto();
-
-  metrics::PerfProvider perf_provider_;
-
-  // Bluetooth Adapter instance for collecting information about paired devices.
-  scoped_refptr<device::BluetoothAdapter> adapter_;
-  metrics::ChromeUserMetricsExtension* uma_proto_;
-
-  DISALLOW_COPY_AND_ASSIGN(MetricsLogChromeOS);
-};
-
-#endif  // CHROME_BROWSER_METRICS_METRICS_LOG_CHROMEOS_H_