Don't set ion=1 for hidden Instant modes.

chrome/browser/search_engines/template_url_prepopulate_data.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/search_engines/template_url_prepopulate_data.h"
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 #include <locale.h>
 #endif
 
@@ skipping 1091 matching lines @@
   L"{google:baseURL}search?{google:RLZ}{google:acceptedSuggestion}"
       L"{google:originalQueryForSuggestion}{google:searchFieldtrialParameter}"
       L"{google:instantFieldTrialGroupParameter}"
       L"sourceid=chrome&ie={inputEncoding}&q={searchTerms}",
   "UTF-8",
   L"{google:baseSuggestURL}search?{google:searchFieldtrialParameter}"
       L"{google:instantFieldTrialGroupParameter}"
       L"client=chrome&hl={language}&q={searchTerms}",
   L"{google:baseURL}webhp?{google:RLZ}sourceid=chrome-instant&"
       L"{google:instantFieldTrialGroupParameter}"
-      L"ie={inputEncoding}&ion=1{searchTerms}",
+      L"ie={inputEncoding}{google:instantEnabledParameter}{searchTerms}",
   SEARCH_ENGINE_GOOGLE,
   1,
 };
 
 const PrepopulatedEngine guruji = {
   L"guruji",
   L"guruji.com",
   "http://guruji.com/favicon.ico",
   L"http://guruji.com/search?q={searchTerms}",
   "UTF-8",
@@ skipping 2042 matching lines @@
                              PrefService::UNSYNCABLE_PREF);
   // Obsolete pref, for migration.
   prefs->RegisterIntegerPref(prefs::kGeoIDAtInstall,
                              -1,
                              PrefService::UNSYNCABLE_PREF);
 }
 
 int GetDataVersion(PrefService* prefs) {
   // Increment this if you change the above data in ways that mean users with
   // existing data should get a new version.
-  const int kCurrentDataVersion = 37;
+  const int kCurrentDataVersion = 38;
   if (!prefs)
     return kCurrentDataVersion;
   // If a version number exist in the preferences file, it overrides the
   // version of the built-in data.
   int version =
     prefs->GetInteger(prefs::kSearchProviderOverridesVersion);
   return (version >= 0) ? version : kCurrentDataVersion;
 }
 
 TemplateURL* MakePrepopulatedTemplateURL(const wchar_t* name,
@@ skipping 193 matching lines @@
 TemplateURL* FindPrepopulatedEngine(const std::string& search_url) {
   GURL search_origin(GetOriginForSearchURL(search_url));
   // First check if it is a Google URL. User may have a custom search provider
   // with a hard-coded Google domain instead of {google:baseURL}.
   if (google_util::IsGoogleHomePageUrl((search_origin.spec())))
     return MakePrepopulateTemplateURLFromPrepopulateEngine(google);
   return GetEngineForOrigin(NULL, search_origin);
 }
 
 }  // namespace TemplateURLPrepopulateData