Add checkbox for reporting invalid TLS/SSL cert chains

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index e652338e21ad7c5395f521782e29fec609e279b2..a049d61ad24b09fe44d102d14caf2fcf3ff7a5d3 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2197,6 +2197,13 @@ const Experiment kExperiments[] = {
     kOsAndroid,
     SINGLE_VALUE_TYPE(switches::kBypassAppBannerEngagementChecks)
   },
+  {
+    "enable-cert-collection",
+    IDS_ENABLE_INVALID_CERT_COLLECTION,
+    IDS_ENABLE_INVALID_CERT_COLLECTION_DESCRIPTION,
+    kOsAll,
+    SINGLE_VALUE_TYPE(switches::kEnableInvalidCertCollection)
+  },
 
   // NOTE: Adding new command-line switches requires adding corresponding
   // entries to enum "LoginCustomFlags" in histograms.xml. See note in