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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_METRICS_CHROMEOS_METRICS_PROVIDER_H_
      6 #define CHROME_BROWSER_METRICS_CHROMEOS_METRICS_PROVIDER_H_
      7 
      8 #include "base/memory/weak_ptr.h"
      9 #include "chrome/browser/metrics/perf_provider_chromeos.h"
     10 #include "components/metrics/metrics_provider.h"
     11 
     12 namespace device {
     13 class BluetoothAdapter;
     14 }
     15 
     16 namespace metrics {
     17 class ChromeUserMetricsExtension;
     18 }
     19 
     20 class PrefRegistrySimple;
     21 class PrefService;
     22 
     23 // Performs ChromeOS specific metrics logging.
     24 class ChromeOSMetricsProvider : public metrics::MetricsProvider {
     25  public:
     26   ChromeOSMetricsProvider();
     27   virtual ~ChromeOSMetricsProvider();
     28 
     29   static void RegisterPrefs(PrefRegistrySimple* registry);
     30 
     31   // Records a crash.
     32   static void LogCrash(const std::string& crash_type);
     33 
     34   // Loads hardware class information. When this task is complete, |callback|
     35   // is run.
     36   void InitTaskGetHardwareClass(const base::Closure& callback);
     37 
     38   // metrics::MetricsProvider:
     39   virtual void OnDidCreateMetricsLog() OVERRIDE;
     40   virtual void ProvideSystemProfileMetrics(
     41       metrics::SystemProfileProto* system_profile_proto) OVERRIDE;
     42   virtual void ProvideStabilityMetrics(
     43       metrics::SystemProfileProto* system_profile_proto) OVERRIDE;
     44   virtual void ProvideGeneralMetrics(
     45       metrics::ChromeUserMetricsExtension* uma_proto) OVERRIDE;
     46 
     47  private:
     48   // Called on the FILE thread to load hardware class information.
     49   void InitTaskGetHardwareClassOnFileThread();
     50 
     51   // Update the number of users logged into a multi-profile session.
     52   // If the number of users change while the log is open, the call invalidates
     53   // the user count value.
     54   void UpdateMultiProfileUserCount(
     55       metrics::SystemProfileProto* system_profile_proto);
     56 
     57   // Sets the Bluetooth Adapter instance used for the WriteBluetoothProto()
     58   // call.
     59   void SetBluetoothAdapter(scoped_refptr<device::BluetoothAdapter> adapter);
     60 
     61   // Writes info about paired Bluetooth devices on this system.
     62   void WriteBluetoothProto(metrics::SystemProfileProto* system_profile_proto);
     63 
     64   metrics::PerfProvider perf_provider_;
     65 
     66   // Bluetooth Adapter instance for collecting information about paired devices.
     67   scoped_refptr<device::BluetoothAdapter> adapter_;
     68 
     69   // Whether the user count was registered at the last log initialization.
     70   bool registered_user_count_at_log_initialization_;
     71 
     72   // The user count at the time that a log was last initialized. Contains a
     73   // valid value only if |registered_user_count_at_log_initialization_| is
     74   // true.
     75   uint64 user_count_at_log_initialization_;
     76 
     77   // Hardware class (e.g., hardware qualification ID). This class identifies
     78   // the configured system components such as CPU, WiFi adapter, etc.
     79   std::string hardware_class_;
     80 
     81   base::WeakPtrFactory<ChromeOSMetricsProvider> weak_ptr_factory_;
     82 
     83   DISALLOW_COPY_AND_ASSIGN(ChromeOSMetricsProvider);
     84 };
     85 
     86 #endif  // CHROME_BROWSER_METRICS_CHROMEOS_METRICS_PROVIDER_H_
     87