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 1fab285cb967f66e509837b5a0fe5254c999870e..a3ab91d02ee542e0b0e69bb52b96c24cfdeee18d 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2260,7 +2260,14 @@ const Experiment kExperiments[] = {
     IDS_FLAGS_ENABLE_MEDIA_ROUTER_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableMediaRouter)
-  }
+  },
+  {
+    "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