Unlaunch the HIDDEN mode.

chrome/browser/search_engines/template_url.cc

Index: chrome/browser/search_engines/template_url.cc
diff --git a/chrome/browser/search_engines/template_url.cc b/chrome/browser/search_engines/template_url.cc
index 157fdc7697c8fd14a52c335c46e310067eca2d38..82b2c779dd4c6afb8f8220aba2d835aadbf99db0 100644
--- a/chrome/browser/search_engines/template_url.cc
+++ b/chrome/browser/search_engines/template_url.cc
@@ -55,8 +55,6 @@ static const char kGoogleBaseSuggestURLParameterFull[] =
     "{google:baseSuggestURL}";
 static const char kGoogleInstantEnabledParameter[] =
     "google:instantEnabledParameter";
-static const char kGoogleInstantFieldTrialGroupParameter[] =
-    "google:instantFieldTrialGroupParameter";
 static const char kGoogleOriginalQueryForSuggestionParameter[] =
     "google:originalQueryForSuggestion";
 static const char kGoogleRLZParameter[] = "google:RLZ";
@@ -209,10 +207,6 @@ std::string TemplateURLRef::ReplaceSearchTermsUsingTermsData(
         url.insert(i->index, search_terms_data.InstantEnabledParam());
         break;
 
-      case GOOGLE_INSTANT_FIELD_TRIAL_GROUP:
-        url.insert(i->index, search_terms_data.InstantFieldTrialUrlParam());
-        break;
-
       case GOOGLE_ORIGINAL_QUERY_FOR_SUGGESTION:
         if (accepted_suggestion >= 0)
           url.insert(i->index, "oq=" + UTF16ToUTF8(encoded_original_query) +
@@ -429,9 +423,6 @@ bool TemplateURLRef::ParseParameter(size_t start,
     replacements->push_back(Replacement(GOOGLE_BASE_SUGGEST_URL, start));
   } else if (parameter == kGoogleInstantEnabledParameter) {
     replacements->push_back(Replacement(GOOGLE_INSTANT_ENABLED, start));
-  } else if (parameter == kGoogleInstantFieldTrialGroupParameter) {
-    replacements->push_back(Replacement(GOOGLE_INSTANT_FIELD_TRIAL_GROUP,
-                                        start));
   } else if (parameter == kGoogleOriginalQueryForSuggestionParameter) {
     replacements->push_back(Replacement(GOOGLE_ORIGINAL_QUERY_FOR_SUGGESTION,
                                         start));