Remove virtual keyboard support.

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_
 #pragma once
 
@@ skipping 224 matching lines @@
 extern const char kLanguageMozcUseAutoImeTurnOff[];
 extern const char kLanguageMozcUseHistorySuggest[];
 extern const char kLanguageMozcUseDictionarySuggest[];
 extern const char kLanguageMozcSuggestionsSize[];
 extern const char kLanguageXkbRemapSearchKeyTo[];
 extern const char kLanguageXkbRemapControlKeyTo[];
 extern const char kLanguageXkbRemapAltKeyTo[];
 extern const char kLanguageXkbAutoRepeatEnabled[];
 extern const char kLanguageXkbAutoRepeatDelay[];
 extern const char kLanguageXkbAutoRepeatInterval[];
-extern const char kLanguagePreferredVirtualKeyboard[];
 extern const char kSpokenFeedbackEnabled[];
 extern const char kHighContrastEnabled[];
 extern const char kScreenMagnifierEnabled[];
 extern const char kVirtualKeyboardEnabled[];
 extern const char kLabsAdvancedFilesystemEnabled[];
 extern const char kLabsMediaplayerEnabled[];
 extern const char kEnableScreenLock[];
 extern const char kShowPlanNotifications[];
 extern const char kShow3gPromoNotification[];
 extern const char kChromeOSReleaseNotesVersion[];
@@ skipping 455 matching lines @@
 #endif
 
 extern const char kInManagedMode[];
 
 extern const char kNetworkProfileWarningsLeft[];
 extern const char kNetworkProfileLastWarningTime[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_