Move ChromeOS hardware class init out of MetricsService.

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 "base/memory/weak_ptr.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);
 
+  // Loads hardware class information. When this task is complete, |callback|
+  // is run.
+  void InitTaskGetHardwareClass(const base::Closure& callback);
+
   // 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:
+  // Called on the FILE thread to load hardware class information.
+  void InitTaskGetHardwareClassOnFileThread();
+
   // 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_;
 
+  // Hardware class (e.g., hardware qualification ID). This class identifies
+  // the configured system components such as CPU, WiFi adapter, etc.
+  std::string hardware_class_;
+
+  base::WeakPtrFactory<ChromeOSMetricsProvider> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeOSMetricsProvider);
 };
 
 #endif  // CHROME_BROWSER_METRICS_CHROMEOS_METRICS_PROVIDER_H_