Cleaning up the custom dictionary code relative to the SpellcheckService to make the custom diction…

chrome/browser/spellchecker/spellcheck_custom_dictionary.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_SPELLCHECKER_SPELLCHECK_CUSTOM_DICTIONARY_H_
 #define CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_CUSTOM_DICTIONARY_H_
 
 #include <string>
 #include <vector>
 
 #include "base/file_path.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "chrome/browser/spellchecker/spellcheck_dictionary.h"
 #include "chrome/common/spellcheck_common.h"
 
 // Defines a custom dictionary which users can add their own words to.
 class SpellcheckCustomDictionary : public SpellcheckDictionary {
  public:
   explicit SpellcheckCustomDictionary(Profile* profile);
   virtual ~SpellcheckCustomDictionary();
 
   virtual void Load() OVERRIDE;
   void WriteWordToCustomDictionary(const std::string& word);
 
   // Returns true if successful. False otherwise. Takes ownership of
   // custom_words and replaces pointer with an empty vector.
   bool SetCustomWordList(chrome::spellcheck_common::WordList* custom_words);
   const chrome::spellcheck_common::WordList& GetCustomWords() const;
   void CustomWordAddedLocally(const std::string& word);
   void LoadDictionaryIntoCustomWordList(
       chrome::spellcheck_common::WordList* custom_words);
 
+  // Adds the given word to the custom words list and inform renderer of the
+  // update.
+  void AddWord(const std::string& word);
+
+  // The reply point for PostTaskAndReply. Called when AddWord is finished
+  // adding a word in the background.
+  void AddWordComplete(const std::string& word);
+
  private:
   // In-memory cache of the custom words file.
   chrome::spellcheck_common::WordList custom_words_;
 
   // A path for custom dictionary per profile.
   FilePath custom_dictionary_path_;
 
+  base::WeakPtrFactory<SpellcheckCustomDictionary> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(SpellcheckCustomDictionary);
 };
 
 #endif  // CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_CUSTOM_DICTIONARY_H_