Add the ability to filter out extension IMEs from the language settings page.

chrome/common/pref_names.h

 // 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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 
 #include <stddef.h>
@@ skipping 186 matching lines @@
 extern const char kDisableGDataHostedFiles[];
 // TODO(yusukes): Change "kLanguageABC" to "kABC". The current form is too long
 // to remember and confusing. The prefs are actually for input methods and i18n
 // keyboards, not UI languages.
 extern const char kLanguageCurrentInputMethod[];
 extern const char kLanguagePreviousInputMethod[];
 extern const char kLanguageHotkeyNextEngineInMenu[];
 extern const char kLanguageHotkeyPreviousEngine[];
 extern const char kLanguagePreferredLanguages[];
 extern const char kLanguagePreloadEngines[];
+extern const char kLanguageFilteredExtensionImes[];
 extern const char kLanguageChewingAutoShiftCur[];
 extern const char kLanguageChewingAddPhraseDirection[];
 extern const char kLanguageChewingEasySymbolInput[];
 extern const char kLanguageChewingEscCleanAllBuf[];
 extern const char kLanguageChewingForceLowercaseEnglish[];
 extern const char kLanguageChewingPlainZhuyin[];
 extern const char kLanguageChewingPhraseChoiceRearward[];
 extern const char kLanguageChewingSpaceAsSelection[];
 extern const char kLanguageChewingMaxChiSymbolLen[];
 extern const char kLanguageChewingCandPerPage[];
@@ skipping 525 matching lines @@
 #endif
 
 extern const char kInManagedMode[];
 
 extern const char kNetworkProfileWarningsLeft[];
 extern const char kNetworkProfileLastWarningTime[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_