Replace incident type handlers with implementations of Incident.

chrome/browser/safe_browsing/incident_reporting/tracked_preference_incident.cc

+// 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.
+
+#include "chrome/browser/safe_browsing/incident_reporting/tracked_preference_incident.h"
+
+#include "base/logging.h"
+#include "chrome/browser/safe_browsing/incident_reporting/incident_handler_util.h"
+#include "chrome/common/safe_browsing/csd.pb.h"
+
+namespace safe_browsing {
+
+TrackedPreferenceIncident::TrackedPreferenceIncident(
+    scoped_ptr<ClientIncidentReport_IncidentData_TrackedPreferenceIncident>
+        tracked_preference_incident) {
+  DCHECK(tracked_preference_incident);
+  DCHECK(tracked_preference_incident->has_path());
+  payload()->set_allocated_tracked_preference(
+      tracked_preference_incident.release());
+}
+
+TrackedPreferenceIncident::~TrackedPreferenceIncident() {
+}
+
+IncidentType TrackedPreferenceIncident::GetType() const {
+  return IncidentType::TRACKED_PREFERENCE;
+}
+
+std::string TrackedPreferenceIncident::GetKey() const {
+  return payload()->tracked_preference().path();
+}
+
+uint32_t TrackedPreferenceIncident::ComputeDigest() const {
+  // Tracked preference incidents are sufficiently canonical (and have no
+  // default values), so it's safe to serialize the incident as given.
+  return HashMessage(payload()->tracked_preference());
+}
+
+scoped_ptr<ClientIncidentReport_IncidentData>
+TrackedPreferenceIncident::TakePayload() {
+  // TODO(grt): filter
+  return Incident::TakePayload();
+}
+
+}  // namespace safe_browsing