Get rid of the ability to unregister preferences.

chrome/common/pref_names.cc

 // 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.
 
 #include "chrome/common/pref_names.h"
 
 #include "base/basictypes.h"
 
 namespace prefs {
 
@@ skipping 769 matching lines @@
 // A boolean pref of whether to show 3G promo notification.
 const char kShow3gPromoNotification[] =
     "settings.internet.mobile.show_3g_promo_notification";
 
 // A string pref that contains version where "What's new" promo was shown.
 const char kChromeOSReleaseNotesVersion[] = "settings.release_notes.version";
 
 // A boolean pref that uses shared proxies.
 const char kUseSharedProxies[] = "settings.use_shared_proxies";
 
-// A string prefs for OAuth1 token.
-const char kOAuth1Token[] = "settings.account.oauth1_token";
-
-// A string prefs for OAuth1 secret.
-const char kOAuth1Secret[] = "settings.account.oauth1_secret";
-
 // A boolean pref that enables the (private) pepper GetID() call.
 const char kEnableCrosDRM[] = "settings.privacy.drm_enabled";
 
 // A dictionary pref that specifies per-display overscan data.  Its key is the
 // display's ID and its value is a dictionary of canceling overscan pixels for
 // 'top', 'right', 'bottom', 'left'.
 const char kDisplayOverscans[] = "settings.display.overscans";
 
 // A 64bit integer pref that specifies the name of the primary display device.
 const char kPrimaryDisplayID[] = "settings.display.primary_id";
@@ skipping 1507 matching lines @@
 const char kRLZDisabled[] = "rlz.disabled";
 #endif
 
 #if defined(ENABLE_APP_LIST)
 // The directory in user data dir that contains the profile to be used with the
 // app launcher.
 extern const char kAppListProfile[] = "app_list.profile";
 #endif
 
 }  // namespace prefs