Record the time when the interstitial is constructed

components/certificate_reporting/cert_logger.proto

 // 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.
 //
 // This protobuffer is intended to store reports from Chrome users of
 // certificate errors. A report will be sent from Chrome when it gets
 // e.g. a certificate for google.com that chains up to a root CA not expected by
 // Chrome for that origin, such as DigiNotar (compromised in July 2011), or
 // other pinning errors such as a blacklisted cert in the chain, or
 // (when opted in) other certificate validation errors like an expired
@@ skipping 24 matching lines @@
     // An interstitial telling the user to update their system clock
     INTERSTITIAL_CLOCK = 3;
   }
 
   // The type of interstitial that was shown
   optional InterstitialReason interstitial_reason = 1;
   // True if the user clicked through to the offending website
   optional bool user_proceeded = 2;
   // True if the user was shown an option to click through
   optional bool overridable = 3;
+  // The time (in usec since the Windows epoch) when the client created the
+  // interstitial.
+  optional int64 interstitial_created_time_usec = 4;
 }
 
 // Contains information about features that are enabled/disabled that
 // might affect certificate validation.
 message CertLoggerFeaturesInfo {
   message NetworkTimeQueryingInfo {
     // True if the network time querying feature is enabled.
     optional bool network_time_queries_enabled = 1;
 
     // The experimental parameter controlling the behavior of network time
@@ skipping 11 matching lines @@
   optional NetworkTimeQueryingInfo network_time_querying_info = 1;
 }
 
 message CertLoggerRequest {
   // The hostname being accessed (required as the cert could be valid for
   // multiple hosts, e.g. a wildcard or a SubjectAltName.
   required string hostname = 1;
   // The certificate chain as a series of PEM-encoded certificates, including
   // intermediates but not necessarily the root.
   required string cert_chain = 2;
-  // The time (in usec since the epoch) when the client attempted to access the
-  // site generating the pinning error.
+  // The time (in usec since the epoch) when the client generated the report.
   required int64 time_usec = 3;
   // public_key_hash contains the string forms of the hashes calculated for
   // the chain. (I.e. "sha1/<base64 data>".)
   repeated string public_key_hash = 4;
   // pin contains the string forms of the pins that were matched against for
   // this host.
   repeated string pin = 5;
 
   enum CertError {
     UNKNOWN_CERT_ERROR = 0;
@@ skipping 30 matching lines @@
   // True if the certificate was rooted at a standard CA root ,as opposed to a
   // user-installed root, but is only meaningful if the underlying certificate
   // validation library built a trusted chain (i.e. the Chrome net stack set the
   // error, not the library).
   optional bool is_issued_by_known_root = 9;
 
   // Information about features that were enabled or disabled for the
   // user that might affect certificate validation.
   optional CertLoggerFeaturesInfo features_info = 10;
 };