Workaround to remove command line flag on ChromeOS.

chrome/browser/bookmarks/enhanced_bookmarks_features.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_BOOKMARKS_ENHANCED_BOOKMARKS_FEATURES_H_
 #define CHROME_BROWSER_BOOKMARKS_ENHANCED_BOOKMARKS_FEATURES_H_
 
 #include <string>
 
 #include "extensions/common/extension.h"
 
+namespace about_flags {
+class FlagsStorage;
+}  // namespace about_flags
+
 class PrefService;
 class Profile;
 
 // States for bookmark experiment. They are set by Chrome sync into
 // sync_driver::prefs::kEnhancedBookmarksExperimentEnabled user preference and
 // used for UMA reporting as well.
 enum BookmarksExperimentState {
   BOOKMARKS_EXPERIMENT_NONE,
   BOOKMARKS_EXPERIMENT_ENABLED,
   BOOKMARKS_EXPERIMENT_ENABLED_USER_OPT_OUT,
@@ skipping 25 matching lines @@
 
 // Sets flag to opt-in user into Finch experiment.
 void ForceFinchBookmarkExperimentIfNeeded(
     PrefService* local_state,
     BookmarksExperimentState bookmarks_experiment_state);
 
 // Returns true if enhanced bookmarks experiment is running.
 // Experiment could run by Chrome sync or by Finch.
 // Note that this doesn't necessarily mean that enhanced bookmarks
 // is enabled, e.g., user can opt out using a flag.
-bool IsEnhancedBookmarksExperimentEnabled();
+bool IsEnhancedBookmarksExperimentEnabled(
+    about_flags::FlagsStorage* flags_storage);
 
 #if defined(OS_ANDROID)
 // Returns true if enhanced bookmark salient image prefetching is enabled.
 // This can be controlled by field trial.
 bool IsEnhancedBookmarkImageFetchingEnabled(const PrefService* user_prefs);
 
 // Returns true if enhanced bookmarks is enabled.
 bool IsEnhancedBookmarksEnabled(const PrefService* user_prefs);
 
 #endif
 
 // Returns true when flag enable-dom-distiller is set or enabled from Finch.
 bool IsEnableDomDistillerSet();
 
 // Returns true when flag enable-sync-articles is set or enabled from Finch.
 bool IsEnableSyncArticlesSet();
 
 #endif  // CHROME_BROWSER_BOOKMARKS_ENHANCED_BOOKMARKS_FEATURES_H_