Add AIA fetching feature info to certificate reports

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 49 matching lines @@
     enum NetworkTimeFetchBehavior {
       NETWORK_TIME_FETCHES_UNKNOWN = 0;
       NETWORK_TIME_FETCHES_BACKGROUND_ONLY = 1;
       NETWORK_TIME_FETCHES_ON_DEMAND_ONLY = 2;
       NETWORK_TIME_FETCHES_IN_BACKGROUND_AND_ON_DEMAND = 3;
     }
     optional NetworkTimeFetchBehavior network_time_query_behavior = 2;
   }
 
   optional NetworkTimeQueryingInfo network_time_querying_info = 1;
+
+  // Records whether the Android AIA fetching feature is enabled.
+  //
+  // This is an enum rather than a boolean as a convenience to
+  // distinguish reports where fetching is disabled from reports that
+  // were sent before this field was present. (In other words, if it
+  // were a boolean, a value of false might mean that fetching was
+  // disabled, or it might mean that the browser version was older than
+  // when this field was added.)
+  enum AndroidAIAFetchingStatus {
+    ANDROID_AIA_FETCHING_UNKNOWN = 0;
+    ANDROID_AIA_FETCHING_ENABLED = 1;
+    ANDROID_AIA_FETCHING_DISABLED = 2;
+  }
+  optional AndroidAIAFetchingStatus android_aia_fetching_status = 2;
 }
 
 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 generated the report.
@@ skipping 44 matching lines @@
   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;
 
   // False when the report is attempted to be uploaded for the first time. True
   // in all other uploads.
   optional bool is_retry_upload = 11;
 };