[Origin Trials] Support updates of disabled token list

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 854 matching lines @@
 
 #if defined(ENABLE_MEDIA_ROUTER)
 extern const char kMediaRouterCloudServicesPrefSet[];
 extern const char kMediaRouterEnableCloudServices[];
 extern const char kMediaRouterFirstRunFlowAcknowledged[];
 extern const char kMediaRouterTabMirroringSources[];
 #endif
 
 extern const char kOriginTrialPublicKey[];
 extern const char kOriginTrialDisabledFeatures[];
+extern const char kOriginTrialDisabledTokens[];
 
 extern const char kComponentUpdatesEnabled[];
 
 #if defined(OS_ANDROID)
 extern const char kSearchGeolocationDisclosureDismissed[];
 extern const char kSearchGeolocationDisclosureShownCount[];
 extern const char kSearchGeolocationDisclosureLastShowDate[];
 extern const char kSearchGeolocationPreDisclosureMetricsRecorded[];
 extern const char kSearchGeolocationPostDisclosureMetricsRecorded[];
 #endif
@@ skipping 14 matching lines @@
 extern const char kBookmarksBubbleIOSPromoDismissed[];
 extern const char kNumberBookmarksFootNoteIOSPromoShown[];
 extern const char kBookmarksFootNoteIOSPromoDismissed[];
 extern const char kNumberHistoryPageIOSPromoShown[];
 extern const char kHistoryPageIOSPromoDismissed[];
 #endif
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_