Modify languageSettingsPrivate IDL and flesh out stub implementation

chrome/browser/extensions/api/language_settings_private/language_settings_private_api.h

Index: chrome/browser/extensions/api/language_settings_private/language_settings_private_api.h
diff --git a/chrome/browser/extensions/api/language_settings_private/language_settings_private_api.h b/chrome/browser/extensions/api/language_settings_private/language_settings_private_api.h
index d30f30071bb35720fdd37303c6e893aae9f1f258..396a709362a5b824d8a813a0990e15d6c224e4b3 100644
--- a/chrome/browser/extensions/api/language_settings_private/language_settings_private_api.h
+++ b/chrome/browser/extensions/api/language_settings_private/language_settings_private_api.h
@@ -46,42 +46,43 @@ class LanguageSettingsPrivateSetLanguageListFunction
   DISALLOW_COPY_AND_ASSIGN(LanguageSettingsPrivateSetLanguageListFunction);
 };
 
-// Implements the languageSettingsPrivate.getSpellCheckDictionaryStatus method.
-class LanguageSettingsPrivateGetSpellCheckDictionaryStatusFunction
+// Implements the languageSettingsPrivate.getSpellcheckDictionaryStatuses
+// method.
+class LanguageSettingsPrivateGetSpellcheckDictionaryStatusesFunction
     : public UIThreadExtensionFunction {
  public:
-  LanguageSettingsPrivateGetSpellCheckDictionaryStatusFunction();
+  LanguageSettingsPrivateGetSpellcheckDictionaryStatusesFunction();
   DECLARE_EXTENSION_FUNCTION(
-      "languageSettingsPrivate.getSpellCheckDictionaryStatus",
+      "languageSettingsPrivate.getSpellcheckDictionaryStatuses",
       LANGUAGESETTINGSPRIVATE_GETSPELLCHECKDICTIONARYSTATUS)
 
  protected:
-  ~LanguageSettingsPrivateGetSpellCheckDictionaryStatusFunction() override;
+  ~LanguageSettingsPrivateGetSpellcheckDictionaryStatusesFunction() override;
 
   // ExtensionFunction overrides.
   ResponseAction Run() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(
-      LanguageSettingsPrivateGetSpellCheckDictionaryStatusFunction);
+      LanguageSettingsPrivateGetSpellcheckDictionaryStatusesFunction);
 };
 
-// Implements the languageSettingsPrivate.getSpellCheckWords method.
-class LanguageSettingsPrivateGetSpellCheckWordsFunction
+// Implements the languageSettingsPrivate.getSpellcheckWords method.
+class LanguageSettingsPrivateGetSpellcheckWordsFunction
     : public UIThreadExtensionFunction {
  public:
-  LanguageSettingsPrivateGetSpellCheckWordsFunction();
-  DECLARE_EXTENSION_FUNCTION("languageSettingsPrivate.getSpellCheckWords",
+  LanguageSettingsPrivateGetSpellcheckWordsFunction();
+  DECLARE_EXTENSION_FUNCTION("languageSettingsPrivate.getSpellcheckWords",
                              LANGUAGESETTINGSPRIVATE_GETSPELLCHECKWORDS)
 
  protected:
-  ~LanguageSettingsPrivateGetSpellCheckWordsFunction() override;
+  ~LanguageSettingsPrivateGetSpellcheckWordsFunction() override;
 
   // ExtensionFunction overrides.
   ResponseAction Run() override;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(LanguageSettingsPrivateGetSpellCheckWordsFunction);
+  DISALLOW_COPY_AND_ASSIGN(LanguageSettingsPrivateGetSpellcheckWordsFunction);
 };
 
 // Implements the languageSettingsPrivate.getTranslateTargetLanguage method.