Cleanup: Remove for_search param from search::InstantExtendedEnabledParam()

components/search/search.h

 // Copyright 2014 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 COMPONENTS_SEARCH_SEARCH_H_
 #define COMPONENTS_SEARCH_SEARCH_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 40 matching lines @@
                                           const FieldTrialFlags& flags);
 
 // Given a FieldTrialFlags object, returns the bool value of the provided flag.
 // Exposed for testing only.
 bool GetBoolValueForFlagWithDefault(const std::string& flag,
                                     bool default_value,
                                     const FieldTrialFlags& flags);
 
 // Returns a string indicating whether InstantExtended is enabled, suitable
 // for adding as a query string param to the homepage or search requests.
-// Returns an empty string otherwise.
-//
-// |for_search| should be set to true for search requests, in which case this
-// returns a non-empty string only if query extraction is enabled.
-std::string InstantExtendedEnabledParam(bool for_search);
+std::string InstantExtendedEnabledParam();
 
 // Returns a string that will cause the search results page to update
 // incrementally. Currently, Instant Extended passes a different param to
 // search results pages that also has this effect, so by default this function
 // returns the empty string when Instant Extended is enabled. However, when
 // doing instant search result prerendering, we still need to pass this param,
 // as Instant Extended does not cause incremental updates by default for the
 // prerender page. Callers should set |for_prerender| in this case to force
 // the returned string to be non-empty.
 std::string ForceInstantResultsParam(bool for_prerender);
 
 // Returns true if 'prefetch_results' flag is set to true in field trials to
 // prefetch high-confidence search suggestions.
 bool ShouldPrefetchSearchResults();
 
 // Returns true if 'reuse_instant_search_base_page' flag is set to true in field
 // trials to reuse the prerendered page to commit any search query.
 bool ShouldReuseInstantSearchBasePage();
 
 // |url| should either have a secure scheme or have a non-HTTPS base URL that
 // the user specified using --google-base-url. (This allows testers to use
 // --google-base-url to point at non-HTTPS servers, which eases testing.)
 bool IsSuitableURLForInstant(const GURL& url, const TemplateURL* template_url);
 
 }  // namespace search
 
 #endif  // COMPONENTS_SEARCH_SEARCH_H_