Replace HistoryQuickProvider protobuf-based caching with an SQLite-based database.

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"
 
@@ skipping 32 matching lines @@
   // return 0.
   static size_t TrimHttpPrefix(string16* url);
 
   // Returns true if inline autocompletion should be prevented. Use this instead
   // of |input.prevent_inline_autocomplete| if the input is passed through
   // FixupUserInput(). This method returns true if
   // |input.prevent_inline_autocomplete()| is true, or the input text contains
   // trailing whitespace, or if always_prevent_inline_autocomplete is true.
   bool PreventInlineAutocomplete(const AutocompleteInput& input);
 
+  // Finds and removes the match from the current collection of matches and
+  // backing data.
+  void DeleteMatchFromMatches(const AutocompleteMatch& match);
+
   // If true, we always prevent inline autocompletions.
   bool always_prevent_inline_autocomplete_;
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_PROVIDER_H_