Gather stability prefs into managing objects.

components/metrics/stability_metrics_provider.h

+// Copyright 2017 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 COMPONENTS_METRICS_STABILITY_METRICS_PROVIDER_H_
+#define COMPONENTS_METRICS_STABILITY_METRICS_PROVIDER_H_
+
+#include "components/metrics/metrics_provider.h"
+
+class PrefService;
+class PrefRegistrySimple;
+
+namespace metrics {
+
+class SystemProfileProto;
+
+// Stores and loads system information to prefs for stability logs.
+class StabilityMetricsProvider : public MetricsProvider {
+ public:
+  StabilityMetricsProvider(PrefService* local_state);
+  ~StabilityMetricsProvider() override;
+
+  static void RegisterPrefs(PrefRegistrySimple* registry);
+
+  void RecordBreakpadRegistration(bool success);
+  void RecordBreakpadHasDebugger(bool has_debugger);
+
+  void CheckLastSessionEndCompleted();
+  void MarkSessionEndCompleted(bool end_completed);
+
+  void LogCrash();
+  void LogStabilityLogDeferred();
+  void LogStabilityDataDiscarded();
+  void LogLaunch();
+  void LogStabilityVersionMismatch();
+
+ private:
+  // Increments an Integer pref value specified by |path|.
+  void IncrementPrefValue(const char* path);
+
+  // MetricsProvider:
+  void ClearSavedStabilityMetrics() override;
+  void ProvideStabilityMetrics(
+      SystemProfileProto* system_profile_proto) override;
+
+  PrefService* local_state_;
+
+  DISALLOW_COPY_AND_ASSIGN(StabilityMetricsProvider);
+};
+
+}  // namespace metrics
+
+#endif  // COMPONENTS_METRICS_STABILITY_METRICS_PROVIDER_H_