Replace incident type handlers with implementations of Incident.

chrome/browser/safe_browsing/incident_reporting/binary_integrity_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_BINARY_INTEGRITY_INCIDENT_H_
+#define CHROME_BROWSER_SAFE_BROWSING_INCIDENT_REPORTING_BINARY_INTEGRITY_INCIDENT_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/safe_browsing/incident_reporting/incident.h"
+
+namespace safe_browsing {
+
+class ClientIncidentReport_IncidentData_BinaryIntegrityIncident;
+
+// An incident representing binaries with invalid signatures.
+class BinaryIntegrityIncident : public Incident {
+ public:
+  explicit BinaryIntegrityIncident(
+      scoped_ptr<ClientIncidentReport_IncidentData_BinaryIntegrityIncident>
+          binary_integrity);
+  ~BinaryIntegrityIncident() override;
+
+  // Incident:

[robertshield, 2015/01/16 13:14:54]

nit: maybe "Incident overrides:" to make it slightly more unambiguous? If the
"// BaseClass:" style comment is conventional, please ignore me. 

[grt (UTC plus 2), 2015/01/17 00:22:29]

Someone (I don't remember who) asked me to do it the way it is in a different
CL. I've switched back to my preferred style, which is "// Foo methods:"

+
+  // Returns IncidentType::BINARY_INTEGRITY.

[robertshield, 2015/01/16 13:14:54]

moar nit: are these methods used by anyone other than the incident reporting
service? or are they effectively part of the contract between FooIncident and
the incident reporting service?
I ask, only because I wonder whether these comments should live in the header or
in the .cc file (since I believe there is also a mild convention to not add
comments to overrides).

[grt (UTC plus 2), 2015/01/17 00:22:29]

Indeed these are documenting the implementation. Moved into .cc.

+  IncidentType GetType() const override;
+
+  // Returns the basename of the binary.
+  std::string GetKey() const override;
+
+  // Returns a digest computed over the payload.
+  uint32_t ComputeDigest() const override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BinaryIntegrityIncident);
+};
+
+}  // namespace safe_browsing
+
+#endif  // CHROME_BROWSER_SAFE_BROWSING_INCIDENT_REPORTING_BINARY_INTEGRITY_INCIDENT_H_