[Autofill/Autocomplete Feature] Substring matching instead of prefix matching.

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 ffe66a946d4e569298bc32a059cd67dead276686..cbe84795d84d34306fe25690a19bd5a23e2411ea 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1154,6 +1154,14 @@ const Experiment kExperiments[] = {
                               switches::kDisableSuggestionsService)
   },
   {
+     "enable-suggestions-with-sub-string-match",
+     IDS_FLAGS_ENABLE_SUGGESTIONS_WITH_SUB_STRING_MATCH_NAME,
+     IDS_FLAGS_ENABLE_SUGGESTIONS_WITH_SUB_STRING_MATCH_DESCRIPTION,
+     kOsAll,
+     SINGLE_VALUE_TYPE(
+             autofill::switches::kEnableSuggestionsWithSubStringMatch)
+  },
+  {
     "enable-supervised-user-blacklist",
     IDS_FLAGS_ENABLE_SUPERVISED_USER_BLACKLIST_NAME,
     IDS_FLAGS_ENABLE_SUPERVISED_USER_BLACKLIST_DESCRIPTION,