Sync user's custom spellcheck dictionary

chrome/renderer/spellchecker/cocoa_spelling_engine_mac.cc

 // 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.
 
 #include "cocoa_spelling_engine_mac.h"
 
 #include "chrome/common/spellcheck_messages.h"
 #include "content/public/renderer/render_thread.h"
 
 using content::RenderThread;
@@ skipping 29 matching lines @@
 // Synchronously query against CocoaSpellinger.
 // TODO(groby): We might want async support here, too. Ideally,
 // all engines share a similar path for async requests.
 void CocoaSpellingEngine::FillSuggestionList(
     const string16& wrong_word,
     std::vector<string16>* optional_suggestions) {
     RenderThread::Get()->Send(new SpellCheckHostMsg_FillSuggestionList(
         wrong_word, optional_suggestions));
 }
 
-void CocoaSpellingEngine::OnWordAdded(const std::string&) {
+void CocoaSpellingEngine::OnWordsAddedRemoved(
+    const std::vector<std::string>& words_added,
+    const std::vector<std::string>& words_removed) {
   // OSX doesn't support the custom dictionary yet.
 }
-
-void CocoaSpellingEngine::OnWordRemoved(const std::string&) {
-  // OSX doesn't support the custom dictionary yet.
-}