Prepare HistoryProvider for componentization

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 "components/omnibox/autocomplete_provider.h"
+#include "components/omnibox/autocomplete_provider_client.h"
 #include "components/omnibox/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:
   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(Profile* profile, AutocompleteProvider::Type type);
+  HistoryProvider(AutocompleteProvider::Type type,
+                  AutocompleteProviderClient* client);
+
   ~HistoryProvider() override;
 
   // 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 TermMatches& matches,
                                                    size_t text_length,
                                                    bool is_url);
 
-  Profile* profile_;
+  AutocompleteProviderClient* client() { return client_; }
+
+ private:
+  AutocompleteProviderClient* client_;
+
+  DISALLOW_COPY_AND_ASSIGN(HistoryProvider);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_PROVIDER_H_