chrome/browser/metrics/android_metrics_provider.h

   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_ANDROID_METRICS_PROVIDER_H_
   6 #define CHROME_BROWSER_METRICS_ANDROID_METRICS_PROVIDER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "chrome/browser/android/activity_type_ids.h"
  10 #include "components/metrics/metrics_provider.h"
  11
  12 class PrefService;
  13 class PrefRegistrySimple;
  14
  15 // AndroidMetricsProvider provides Android-specific stability metrics.
  16 class AndroidMetricsProvider : public metrics::MetricsProvider {
  17  public:
  18   // Creates the AndroidMetricsProvider with the given |local_state|.
  19   explicit AndroidMetricsProvider(PrefService* local_state);
  20   virtual ~AndroidMetricsProvider();
  21
  22   // Called when the Activity that the user interacts with is swapped out.
  23   // TODO(asvitkine): Expose a way for Android code to actually invoke this.
  24   void OnForegroundActivityChanged(ActivityTypeIds::Type type);
  25
  26   // metrics::MetricsDataProvider:
  27   virtual void ProvideStabilityMetrics(
  28       metrics::SystemProfileProto* system_profile_proto) OVERRIDE;
  29
  30   // Registers local state prefs used by this class.
  31   static void RegisterPrefs(PrefRegistrySimple* registry);
  32
  33  private:
  34   // Called to log launch and crash stats to preferences.
  35   void LogStabilityToPrefs();
  36
  37   // Converts crash stats stored in the preferences into histograms.
  38   void ConvertStabilityPrefsToHistograms();
  39
  40   // Weak pointer to the local state prefs store.
  41   PrefService* local_state_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(AndroidMetricsProvider);
  44 };
  45
  46 #endif  // CHROME_BROWSER_METRICS_ANDROID_METRICS_PROVIDER_H_