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 "chrome/browser/metrics/perf_provider_chromeos.h"
 #include "components/metrics/metrics_provider.h"
 
@@ skipping 12 matching lines @@
 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);
 
+  // Called on the FILE thread to load hardware
+  // class information. When this task is complete, |done_callback| is run on
+  // |target_loop|.
+  void InitTaskGetHardwareClass(base::MessageLoopProxy* target_loop,
+                                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:
   // 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
@@ skipping 15 matching lines @@
   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_;
 
+  // Chrome OS hardware class (e.g., hardware qualification ID). This
+  // class identifies the configured system components such as CPU,
+  // WiFi adapter, etc.
+  std::string hardware_class_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeOSMetricsProvider);
 };
 
 #endif  // CHROME_BROWSER_METRICS_CHROMEOS_METRICS_PROVIDER_H_