Fixed enhanced bookmarks experiment state lost durring previous review.

chrome/browser/bookmarks/enhanced_bookmarks_features.cc

 // 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.
 
 #include "chrome/browser/bookmarks/enhanced_bookmarks_features.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
@@ skipping 37 matching lines @@
   }
   if (bookmarks_experiment_state == kBookmarksExperimentEnabled) {
     *extension_id = user_prefs->GetString(
         sync_driver::prefs::kEnhancedBookmarksExtensionId);
     return !extension_id->empty();
   }
 
   return false;
 }
 
-void UpdateBookmarksExperimentState(const PrefService* user_prefs,
+void UpdateBookmarksExperimentState(PrefService* user_prefs,
                                     PrefService* local_state,
                                     bool user_signed_in) {
   BookmarksExperimentState bookmarks_experiment_state_before =
       static_cast<BookmarksExperimentState>(user_prefs->GetInteger(
           sync_driver::prefs::kEnhancedBookmarksExperimentEnabled));
   // If user signed out, clear possible previous state.
   if (!user_signed_in) {
     bookmarks_experiment_state_before = kNoBookmarksExperiment;
     ForceFinchBookmarkExperimentIfNeeded(local_state, kNoBookmarksExperiment);
   }
@@ skipping 35 matching lines @@
       bookmarks_experiment_new_state = kBookmarksExperimentEnabledUserOptOut;
     } else {
       // User opted in again.
       bookmarks_experiment_new_state = kBookmarksExperimentEnabled;
     }
   }
 
   UMA_HISTOGRAM_ENUMERATION("EnhancedBookmarks.SyncExperimentState",
                             bookmarks_experiment_new_state,
                             kBookmarksExperimentEnumSize);
+  user_prefs->SetInteger(
+      sync_driver::prefs::kEnhancedBookmarksExperimentEnabled,
+      bookmarks_experiment_new_state);
   if (bookmarks_experiment_state_before != bookmarks_experiment_new_state)
     ForceFinchBookmarkExperimentIfNeeded(local_state,
                                          bookmarks_experiment_new_state);
 }
 
 void ForceFinchBookmarkExperimentIfNeeded(
     PrefService* local_state,
     BookmarksExperimentState bookmarks_experiment_state) {
 // Chrome OS doesnt use local storage for experiments flags.
 #if !defined(OS_CHROMEOS)
@@ skipping 50 matching lines @@
   if (CommandLine::ForCurrentProcess()->
       HasSwitch(switches::kEnableSyncArticles)) {
     return true;
   }
   if (chrome_variations::GetVariationParamValue(
           kFieldTrialName, "enable-sync-articles") == "1")
     return true;
 
   return false;
 }