Add experimental feature info to certificate reports

components/certificate_reporting/error_report.cc

Index: components/certificate_reporting/error_report.cc
diff --git a/components/certificate_reporting/error_report.cc b/components/certificate_reporting/error_report.cc
index 18145e70005e5d6348615360706fc26ad400685e..ee6cef8d0bedc234cc7da38f344d15a9ceea978f 100644
--- a/components/certificate_reporting/error_report.cc
+++ b/components/certificate_reporting/error_report.cc
@@ -4,12 +4,16 @@
 
 #include "components/certificate_reporting/error_report.h"
 
+#include <map>
+#include <string>
 #include <vector>
 
+#include "base/feature_list.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
 #include "components/certificate_reporting/cert_logger.pb.h"
+#include "components/variations/variations_associated_data.h"
 #include "net/cert/cert_status_flags.h"
 #include "net/cert/x509_certificate.h"
 #include "net/ssl/ssl_info.h"
@@ -124,4 +128,20 @@ const std::string& ErrorReport::hostname() const {
   return cert_report_->hostname();
 }
 
+void ErrorReport::AddFeature(const base::Feature& feature) {
+  CertLoggerFeatureInfo* report_feature = cert_report_->add_features_info();
+  report_feature->set_feature(feature.name);
+  report_feature->set_enabled(base::FeatureList::IsEnabled(feature));
+  std::map<std::string, std::string> params;
+  if (!variations::GetVariationParamsByFeature(feature, &params)) {
+    // Feature is not enabled or there are no params.
+    return;
+  }
+  for (const auto& param : params) {
+    CertLoggerFeatureInfo::Parameter* parameter = report_feature->add_params();
+    parameter->set_name(param.first);
+    parameter->set_value(param.second);
+  }
+}
+
 }  // namespace certificate_reporting