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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_CHROME_STABILITY_METRICS_PROVIDER_H_
      6 #define CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/metrics/user_metrics.h"
     10 #include "base/process/kill.h"
     11 #include "components/metrics/metrics_provider.h"
     12 #include "content/public/browser/browser_child_process_observer.h"
     13 #include "content/public/browser/notification_observer.h"
     14 #include "content/public/browser/notification_registrar.h"
     15 
     16 class PrefRegistrySimple;
     17 
     18 namespace content {
     19 class RenderProcessHost;
     20 class WebContents;
     21 }
     22 
     23 // ChromeStabilityMetricsProvider gathers and logs Chrome-specific stability-
     24 // related metrics.
     25 class ChromeStabilityMetricsProvider
     26     : public metrics::MetricsProvider,
     27       public content::BrowserChildProcessObserver,
     28       public content::NotificationObserver {
     29  public:
     30   ChromeStabilityMetricsProvider();
     31   virtual ~ChromeStabilityMetricsProvider();
     32 
     33   // metrics::MetricsDataProvider:
     34   virtual void OnRecordingEnabled() OVERRIDE;
     35   virtual void OnRecordingDisabled() OVERRIDE;
     36   virtual void ProvideStabilityMetrics(
     37       metrics::SystemProfileProto* system_profile_proto) OVERRIDE;
     38   virtual void ClearSavedStabilityMetrics() OVERRIDE;
     39 
     40   // Registers local state prefs used by this class.
     41   static void RegisterPrefs(PrefRegistrySimple* registry);
     42 
     43  private:
     44   // content::NotificationObserver:
     45   virtual void Observe(int type,
     46                        const content::NotificationSource& source,
     47                        const content::NotificationDetails& details) OVERRIDE;
     48 
     49   // content::BrowserChildProcessObserver:
     50   virtual void BrowserChildProcessCrashed(
     51       const content::ChildProcessData& data) OVERRIDE;
     52 
     53   // Logs the initiation of a page load and uses |web_contents| to do
     54   // additional logging of the type of page loaded.
     55   void LogLoadStarted(content::WebContents* web_contents);
     56 
     57   // Records a renderer process crash.
     58   void LogRendererCrash(content::RenderProcessHost* host,
     59                         base::TerminationStatus status,
     60                         int exit_code);
     61 
     62   // Records a renderer process hang.
     63   void LogRendererHang();
     64 
     65   // Registrar for receiving stability-related notifications.
     66   content::NotificationRegistrar registrar_;
     67 
     68   DISALLOW_COPY_AND_ASSIGN(ChromeStabilityMetricsProvider);
     69 };
     70 
     71 #endif  // CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_
     72