[WIP][DO NOT LAND] Componentize spellcheck

chrome/common/pref_names.h

Index: chrome/common/pref_names.h
diff --git a/chrome/common/pref_names.h b/chrome/common/pref_names.h
index 86ba49aa1d442f30d24ab27f31aebdd2d7b0c34c..b4dffa8e2520a2c26896fb132cde03d4206187a9 100644
--- a/chrome/common/pref_names.h
+++ b/chrome/common/pref_names.h
@@ -303,7 +303,7 @@ extern const char kQuickUnlockFeatureNotificationShown[];
 #endif  // defined(OS_CHROMEOS)
 extern const char kShowHomeButton[];
 extern const char kRecentlySelectedEncoding[];
-extern const char kEnableContinuousSpellcheck[];
+//extern const char kEnableContinuousSpellcheck[];
 extern const char kSpeechRecognitionFilterProfanities[];
 extern const char kSavingBrowserHistoryDisabled[];
 extern const char kAllowDeletingBrowserHistory[];
@@ -492,9 +492,9 @@ extern const char kDefaultTasksBySuffix[];
 
 extern const char kSelectFileLastDirectory[];
 
-extern const char kSpellCheckDictionaries[];
-extern const char kSpellCheckDictionary[];
-extern const char kSpellCheckUseSpellingService[];
+//extern const char kSpellCheckDictionaries[];
+//extern const char kSpellCheckDictionary[];
+//extern const char kSpellCheckUseSpellingService[];
 
 extern const char kExcludedSchemes[];