Add a URL param to indicate group selection in Instant field trial.

chrome/browser/search_engines/template_url_service.h

 // Copyright (c) 2011 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_SERVICE_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 73 matching lines @@
   // not want to auto-add keywords, such as keywords for searches on pages that
   // themselves come from form submissions.
   static string16 GenerateKeyword(const GURL& url, bool autodetected);
 
   // Removes any unnecessary characters from a user input keyword.
   // This removes the leading scheme, "www." and any trailing slash.
   static string16 CleanUserInputKeyword(const string16& keyword);
 
   // Returns the search url for t_url.  Returns an empty GURL if t_url has no
   // url().
-  static GURL GenerateSearchURL(const TemplateURL* t_url);
+  static GURL GenerateSearchURL(const TemplateURL* t_url, Profile* profile);
 
   // Just like GenerateSearchURL except that it takes SearchTermsData to supply
   // the data for some search terms. Most of the time GenerateSearchURL should
   // be called.
   static GURL GenerateSearchURLUsingTermsData(
       const TemplateURL* t_url,
       const SearchTermsData& search_terms_data);
 
   // Returns true if there is no TemplateURL that conflicts with the
   // keyword/url pair, or there is one but it can be replaced. If there is an
@@ skipping 349 matching lines @@
   // List of extension IDs waiting for Load to have keywords registered.
   std::vector<std::string> pending_extension_ids_;
 
   // Function returning current time in base::Time units.
   TimeProvider* time_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(TemplateURLService);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_H_