Add additional UMA stats for remembering certificate decisions.

content/public/browser/ssl_host_state_delegate.h

 // Copyright 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 CONTENT_PUBLIC_BROWSER_SSL_HOST_STATE_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_SSL_HOST_STATE_DELEGATE_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/content_export.h"
@@ skipping 13 matching lines @@
 
   // Records that |cert| is permitted to be used for |host| in the future, for
   // a specified |error| type.
   virtual void AllowCert(const std::string&,
                          net::X509Certificate* cert,
                          net::CertStatus error) = 0;
 
   // Clear all allow/deny preferences.
   virtual void Clear() = 0;
 
-  // Queries whether |cert| is allowed or denied for |host| and |error|.
-  virtual net::CertPolicy::Judgment QueryPolicy(const std::string& host,
-                                                net::X509Certificate* cert,
-                                                net::CertStatus error) = 0;
+  // Queries whether |cert| is allowed or denied for |host| and |error|. Returns
+  // true in |expired_previous_decision| if a previous user decision expired
+  // immediately prior to this query, otherwise false.
+  virtual net::CertPolicy::Judgment QueryPolicy(
+      const std::string& host,
+      net::X509Certificate* cert,
+      net::CertStatus error,
+      bool* expired_previous_decision) = 0;
 
   // Revoke all allow/deny preferences for |host|.
   virtual void RevokeAllowAndDenyPreferences(const std::string& host) = 0;
 
   // Returns true if any decisions has been recorded for |host|, otherwise
   // false.
   virtual bool HasAllowedOrDeniedCert(const std::string& host) = 0;
 
  protected:
   virtual ~SSLHostStateDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_SSL_HOST_STATE_DELEGATE_H_