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..12663d020df71f9add41d68365080189ffaaba89 100644
--- a/components/certificate_reporting/error_report.cc
+++ b/components/certificate_reporting/error_report.cc
@@ -4,8 +4,11 @@
 
 #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"
@@ -124,4 +127,17 @@ const std::string& ErrorReport::hostname() const {
   return cert_report_->hostname();
 }
 
+void ErrorReport::AddFeature(const std::string& feature_name,
+                             bool enabled,
+                             const std::map<std::string, std::string>& params) {
+  CertLoggerFeatureInfo* report_feature = cert_report_->add_features_info();
+  report_feature->set_feature(feature_name);
+  report_feature->set_enabled(enabled);
+  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