Make HistoryContentsProvider results deletable

chrome/browser/autocomplete/history_provider.h

 // Copyright (c) 2010 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_
 #pragma once
 
+#include "base/compiler_specific.h"
 #include "chrome/browser/autocomplete/autocomplete.h"
-#include "chrome/browser/autocomplete/history_provider_util.h"
 
 namespace history {
 
 class HistoryBackend;
 class URLDatabase;
 class URLRow;
 
 }  // namespace history
 
 // This class is a base class for the history autocomplete providers and
 // provides functions useful to all derived classes.
 class HistoryProvider : public AutocompleteProvider {
  protected:
   enum MatchType {
     NORMAL,
     WHAT_YOU_TYPED,
     INLINE_AUTOCOMPLETE
   };
 
   HistoryProvider(ACProviderListener* listener,
                   Profile* profile,
                   const char* name);
 
+  virtual void DeleteMatch(const AutocompleteMatch& match) OVERRIDE;

[Peter Kasting, 2010/12/17 19:32:01]

This causes the HistoryQuickProvider to inherit this as well.  That's probably
problematic as I believe deleting matches there, while desirable, will require
additional bookkeeping.  You should probably scan that file or talk to mrossetti
so you can write an override in that class that calls this function and also
performs the additional work.

+
   // Fixes up user URL input to make it more possible to match against.  Among
   // many other things, this takes care of the following:
   // * Prepending file:// to file URLs
   // * Converting drive letters in file URLs to uppercase
   // * Converting case-insensitive parts of URLs (like the scheme and domain)
   //   to lowercase
   // * Convert spaces to %20s
   // Note that we don't do this in AutocompleteInput's constructor, because if
   // e.g. we convert a Unicode hostname to punycode, other providers will show
   // output that surprises the user ("Search Google for xn--6ca.com").
   static std::wstring FixupUserInput(const AutocompleteInput& input);
 
   // Trims "http:" and up to two subsequent slashes from |url|.  Returns the
   // number of characters that were trimmed.
   // NOTE: For a view-source: URL, this will trim from after "view-source:" and
   // return 0.
   static size_t TrimHttpPrefix(std::wstring* url);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_PROVIDER_H_