Move InMemoryURLIndex outside of history namespace

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/in_memory_url_index_types.h"
 #include "components/omnibox/autocomplete_provider.h"
@@ skipping 16 matching lines @@
  protected:
   HistoryProvider(Profile* profile, AutocompleteProvider::Type type);
   ~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 history::TermMatches& matches,
-      size_t text_length,
-      bool is_url);
+  static ACMatchClassifications SpansFromTermMatch(const TermMatches& matches,
+                                                   size_t text_length,
+                                                   bool is_url);
 
   Profile* profile_;
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_PROVIDER_H_