Remove listener_ from AutocompleteProvider base class

chrome/browser/autocomplete/history_provider.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_AUTOCOMPLETE_HISTORY_PROVIDER_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_HISTORY_PROVIDER_H_
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/autocomplete/autocomplete_provider.h"
 #include "chrome/browser/history/in_memory_url_index_types.h"
 
 class AutocompleteInput;
 class Profile;
 struct AutocompleteMatch;
 
 // This class is a base class for the history autocomplete providers and
 // provides functions useful to all derived classes.
 class HistoryProvider : public AutocompleteProvider {
  public:
   virtual void DeleteMatch(const AutocompleteMatch& match) OVERRIDE;
 
   // Returns true if inline autocompletion should be prevented for URL-like
   // input.  This method returns true if input.prevent_inline_autocomplete()
   // is true or the input text contains trailing whitespace.
   static bool PreventInlineAutocomplete(const AutocompleteInput& input);
 
  protected:
-  HistoryProvider(AutocompleteProviderListener* listener,
-                  Profile* profile,
-                  AutocompleteProvider::Type type);
+  HistoryProvider(Profile* profile, AutocompleteProvider::Type type);
   virtual ~HistoryProvider();
 
   // Finds and removes the match from the current collection of matches and
   // backing data.
   void DeleteMatchFromMatches(const AutocompleteMatch& match);
 
   // Fill and return an ACMatchClassifications structure given the |matches|
   // to highlight.
   static ACMatchClassifications SpansFromTermMatch(
       const history::TermMatches& matches,
       size_t text_length,
       bool is_url);
 
   Profile* profile_;
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_PROVIDER_H_