Move ChromeOS hardware class init out of MetricsService.

chrome/browser/metrics/chrome_metrics_service_client.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_CHROME_METRICS_SERVICE_CLIENT_H_
 #define CHROME_BROWSER_METRICS_CHROME_METRICS_SERVICE_CLIENT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "chrome/browser/metrics/network_stats_uploader.h"
 #include "components/metrics/metrics_service_client.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
+class ChromeOSMetricsProvider;
 class MetricsService;
 
 namespace metrics {
 class MetricsStateManager;
 }
 
 // ChromeMetricsServiceClient provides an implementation of MetricsServiceClient
 // that depends on chrome/.
 class ChromeMetricsServiceClient : public metrics::MetricsServiceClient,
                                    public content::NotificationObserver {
@@ skipping 48 matching lines @@
   void CountBrowserCrashDumpAttempts();
 #endif  // OS_WIN
 
   base::ThreadChecker thread_checker_;
 
   // The MetricsService that |this| is a client of.
   scoped_ptr<MetricsService> metrics_service_;
 
   content::NotificationRegistrar registrar_;
 
+  // On ChromeOS, holds a weak pointer to the ChromeOSMetricsProvider instance
+  // that has been registered with MetricsService. On other platforms, is NULL.
+  ChromeOSMetricsProvider* chromeos_metrics_provider_;
+
   NetworkStatsUploader network_stats_uploader_;
 
   // Saved callback received from CollectFinalMetrics().
   base::Closure collect_final_metrics_done_callback_;
 
   // Indicates that collect final metrics step is running.
   bool waiting_for_collect_final_metrics_step_;
 
   // Number of async histogram fetch requests in progress.
   int num_async_histogram_fetches_in_progress_;
 
   base::WeakPtrFactory<ChromeMetricsServiceClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeMetricsServiceClient);
 };
 
 #endif  // CHROME_BROWSER_METRICS_CHROME_METRICS_SERVICE_CLIENT_H_