Calculate severity score for date_invalid error

chrome/browser/ssl/ssl_error_classification.h

+// Copyright (c) 2014 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_SSL_SSL_ERROR_CLASSIFICATION_H_
+#define CHROME_BROWSER_SSL_SSL_ERROR_CLASSIFICATION_H_
+
+#include "base/time/time.h"
+#include "net/cert/x509_certificate.h"
+
+// This class calculates the severity scores for the different type of SSL
+// errors.
+class SSLErrorClassification {
+ public:
+  SSLErrorClassification(base::Time current_time,
+                         const::net::X509Certificate& cert);
+  ~SSLErrorClassification();
+
+  // Functions which check whether the user clock is wrong or not.
+  static bool IsUserClockInThePast(base::Time time_now);
+  static bool IsUserClockInTheFuture(base::Time time_now);
+
+  // A function which calculates the severity score when the ssl error is
+  // CERT_DATE_INVALID.
+  float InvalidDateSeverityScore() const;
+
+  void RecordUMAStatistics(bool overridable);

[felt, 2014/07/11 14:12:48]

could this also be a static method, at least for now?

[radhikabhar, 2014/07/11 16:34:46]

Done.

But in the future if I have to record any other cause as a UMA histogram for
e.g. host name too broad for a wildcard certificate then I have will have to
make it non-static.

+  base::TimeDelta TimePassedSinceExpiry() const;
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(SSLErrorClassification, TestDateInvalidScore);
+
+  float CalculateScoreTimePassedSinceExpiry() const;
+
+  // This stores the current time.
+  base::Time current_time_;
+
+  // This stores the certificate.
+  const net::X509Certificate& cert_;
+};
+
+#endif  // CHROME_BROWSER_SSL_SSL_ERROR_CLASSIFICATION_H_