Sync user's custom spellcheck dictionary

chrome/renderer/spellchecker/cocoa_spelling_engine_mac.cc

Index: chrome/renderer/spellchecker/cocoa_spelling_engine_mac.cc
diff --git a/chrome/renderer/spellchecker/cocoa_spelling_engine_mac.cc b/chrome/renderer/spellchecker/cocoa_spelling_engine_mac.cc
index 4ad831d6f0e9d2c1fc7484b9825f4e2692877f4a..15f416bd30ddc0f290d38c55d74ed7dc99ef5982 100644
--- a/chrome/renderer/spellchecker/cocoa_spelling_engine_mac.cc
+++ b/chrome/renderer/spellchecker/cocoa_spelling_engine_mac.cc
@@ -47,10 +47,8 @@ void CocoaSpellingEngine::FillSuggestionList(
         wrong_word, optional_suggestions));
 }
 
-void CocoaSpellingEngine::OnWordAdded(const std::string&) {
-  // OSX doesn't support the custom dictionary yet.
-}
-
-void CocoaSpellingEngine::OnWordRemoved(const std::string&) {
+void CocoaSpellingEngine::OnCustomDictionaryChanged(
+    const std::vector<std::string>& words_added,
+    const std::vector<std::string>& words_removed) {
   // OSX doesn't support the custom dictionary yet.
 }