Replace incident type handlers with implementations of Incident.

chrome/browser/safe_browsing/incident_reporting/tracked_preference_incident.h

+// Copyright 2015 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_SAFE_BROWSING_INCIDENT_REPORTING_TRACKED_PREFERENCE_INCIDENT_H_
+#define CHROME_BROWSER_SAFE_BROWSING_INCIDENT_REPORTING_TRACKED_PREFERENCE_INCIDENT_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/safe_browsing/incident_reporting/incident.h"
+
+namespace safe_browsing {
+
+class ClientIncidentReport_IncidentData_TrackedPreferenceIncident;
+
+// An incident representing a tracked preference that has been modified or
+// cleared.
+class TrackedPreferenceIncident : public Incident {
+ public:
+  explicit TrackedPreferenceIncident(
+      scoped_ptr<ClientIncidentReport_IncidentData_TrackedPreferenceIncident>
+          tracked_preference);
+  ~TrackedPreferenceIncident() override;
+
+  // Incident:
+
+  // Returns IncidentType::TRACKED_PREFERENCE.
+  IncidentType GetType() const override;
+
+  // Returns the preference path.
+  std::string GetKey() const override;
+
+  // Returns a digest computed over the payload.
+  uint32_t ComputeDigest() const override;
+
+  scoped_ptr<ClientIncidentReport_IncidentData> TakePayload() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TrackedPreferenceIncident);
+};
+
+}  // namespace safe_browsing
+
+#endif  // CHROME_BROWSER_SAFE_BROWSING_INCIDENT_REPORTING_TRACKED_PREFERENCE_INCIDENT_H_