Refactor MetricsLogChromeOS to ChromeOSMetricsProvider.

chrome/browser/metrics/chromeos_metrics_provider.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_CHROMEOS_METRICS_PROVIDER_H_
+#define CHROME_BROWSER_METRICS_CHROMEOS_METRICS_PROVIDER_H_
+
+#include "chrome/browser/metrics/perf_provider_chromeos.h"
+#include "components/metrics/metrics_provider.h"
+
+namespace device {
+class BluetoothAdapter;
+}
+
+namespace metrics {
+class ChromeUserMetricsExtension;
+}
+
+class PrefRegistrySimple;
+class PrefService;
+
+// Performs ChromeOS specific metrics logging.
+class ChromeOSMetricsProvider : public metrics::MetricsProvider {
+ public:
+  ChromeOSMetricsProvider();
+  virtual ~ChromeOSMetricsProvider();
+
+  static void RegisterPrefs(PrefRegistrySimple* registry);
+
+  // Records a crash.
+  static void LogCrash(const std::string& crash_type);
+
+  // metrics::MetricsProvider:
+  virtual void OnDidCreateMetricsLog() OVERRIDE;
+  virtual void ProvideSystemProfileMetrics(
+      metrics::SystemProfileProto* system_profile_proto) OVERRIDE;
+  virtual void ProvideStabilityMetrics(
+      metrics::SystemProfileProto* system_profile_proto) OVERRIDE;
+
+ 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(
+      metrics::SystemProfileProto* system_profile_proto);
+
+  // 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.
+  void WriteBluetoothProto(metrics::SystemProfileProto* system_profile_proto);
+
+  metrics::PerfProvider perf_provider_;
+
+  // Bluetooth Adapter instance for collecting information about paired devices.
+  scoped_refptr<device::BluetoothAdapter> adapter_;
+  metrics::ChromeUserMetricsExtension* uma_proto_;
+
+  // Whether the user count was registered at the last log initialization.
+  bool registered_user_count_at_log_initialization_;
+
+  // The user count at the time that a log was last initialized. Contains a
+  // valid value only if |registered_user_count_at_log_initialization_| is
+  // true.
+  uint64 user_count_at_log_initialization_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeOSMetricsProvider);
+};
+
+#endif  // CHROME_BROWSER_METRICS_CHROMEOS_METRICS_PROVIDER_H_