[Android] Use correct enhanced bookmarks enabling logic.

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"
@@ skipping 25 matching lines @@
     PrefService* user_prefs,
     PrefService* local_state,
     bool user_signed_in,
     BookmarksExperimentState experiment_enabled_from_sync);
 
 // 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 enabled.
-// Experiment could be enable from Chrome sync or from Finch.
+// 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();
 
 #if defined(OS_ANDROID)
-bool IsEnhancedBookmarkImageFetchingEnabled();
+// 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_