Move Mac to using renderer spellchecker.

chrome/renderer/spellchecker/spellcheck.h

 // Copyright (c) 2009 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_RENDERER_SPELLCHECKER_SPELLCHECK_H_
 #define CHROME_RENDERER_SPELLCHECKER_SPELLCHECK_H_
 
 #include <queue>
 #include <string>
 #include <vector>
@@ skipping 34 matching lines @@
   bool SpellCheckWord(const char16* in_word,
                       int in_word_len,
                       int tag,
                       int* misspelling_start,
                       int* misspelling_len,
                       std::vector<string16>* optional_suggestions);
 
   // Find a possible correctly spelled word for a misspelled word. Computes an
   // empty string if input misspelled word is too long, there is ambiguity, or
   // the correct spelling cannot be determined.
+  // NOTE: If using the platform spellchecker, this will send a *lot* of sync
+  // IPCs. We should probably refactor this if we ever plan to take it out from
+  // behind its command line flag.
   string16 GetAutoCorrectionWord(const string16& word, int tag);
 
   // Turn auto spell correct support ON or OFF.
   // |turn_on| = true means turn ON; false means turn OFF.
   void EnableAutoSpellCorrect(bool turn_on);
 
   // Add a word to the custom list. This may be called before or after
   // |hunspell_| has been initialized.
   void WordAdded(const std::string& word);
 
@@ skipping 49 matching lines @@
   // This flags whether we have ever been initialized, or have asked the browser
   // for a dictionary. The value indicates whether we should request a
   // dictionary from the browser when the render view asks us to check the
   // spelling of a word.
   bool initialized_;
 
   DISALLOW_COPY_AND_ASSIGN(SpellCheck);
 };
 
 #endif  // CHROME_RENDERER_SPELLCHECKER_SPELLCHECK_H_