Unlaunch the HIDDEN mode.

chrome/browser/autocomplete/autocomplete.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/autocomplete/autocomplete.h"
 
 #include <algorithm>
 #include <iterator>
 #include <set>
 
@@ skipping 914 matching lines @@
   for (ACProviders::iterator i(providers_.begin()); i != providers_.end();
        ++i) {
     (*i)->Start(input_, minimal_changes);
     if (matches_requested != AutocompleteInput::ALL_MATCHES)
       DCHECK((*i)->done());
   }
   if (matches_requested == AutocompleteInput::ALL_MATCHES &&
       (text.length() < 6)) {
     base::TimeTicks end_time = base::TimeTicks::Now();
     std::string name = "Omnibox.QueryTime." + base::IntToString(text.length()) +
-        InstantFieldTrial::GetGroupName(profile_);
+        InstantFieldTrial::GetModeAsString(profile_);
     base::Histogram* counter = base::Histogram::FactoryGet(
         name, 1, 1000, 50, base::Histogram::kUmaTargetedHistogramFlag);
     counter->Add(static_cast<int>((end_time - start_time).InMilliseconds()));
   }
   in_start_ = false;
   CheckIfDone();
   UpdateResult(true);
 
   if (!done_)
     StartExpireTimer();
@@ skipping 194 matching lines @@
     : text(text),
       input_type(input_type),
       selected_index(selected_index),
       tab_id(tab_id),
       current_page_classification(current_page_classification),
       elapsed_time_since_user_first_modified_omnibox(
           elapsed_time_since_user_first_modified_omnibox),
       inline_autocompleted_length(inline_autocompleted_length),
       result(result) {
 }