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

chrome/browser/search_engines/template_url.h

 // 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.
 
 #ifndef CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 150 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(TemplateURLTest, ParseURLNoKnownParameters);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLTest, ParseURLTwoParameters);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLTest, ParseURLNestedParameter);
 
   // Enumeration of the known types.
   enum ReplacementType {
     ENCODING,
     GOOGLE_ACCEPTED_SUGGESTION,
     GOOGLE_BASE_URL,
     GOOGLE_BASE_SUGGEST_URL,
+    GOOGLE_INSTANT_ENABLED,
     GOOGLE_INSTANT_FIELD_TRIAL_GROUP,
     GOOGLE_ORIGINAL_QUERY_FOR_SUGGESTION,
     GOOGLE_RLZ,
     GOOGLE_SEARCH_FIELDTRIAL_GROUP,
     GOOGLE_UNESCAPED_SEARCH_TERMS,
     LANGUAGE,
     SEARCH_TERMS,
   };
 
   // Used to identify an element of the raw url that can be replaced.
@@ skipping 367 matching lines @@
   SearchEngineType search_engine_type_;
   int prepopulate_id_;
   // The primary unique identifier for Sync. This is only set on TemplateURLs
   // that have been associated with Sync.
   std::string sync_guid_;
 
   // TODO(sky): Add date last parsed OSD file.
 };
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_H_