Use Smart Lock preference instead of Chrome Password manager preference

chrome/browser/resources/options/browser_options.html

 <if expr="chromeos">
 <link rel="import" href="/people_page/lock_screen_constants.html">
 </if>
 <div id="settings" class="page" hidden>
   <header>
     <h1 i18n-content="settingsTitle"></h1>
   </header>
   <include src="automatic_settings_reset_banner.html">
 <if expr="chromeos">
   <link rel="import" href="chrome://resources/cr_elements/network/cr_network_icon.html">
@@ skipping 552 matching lines @@
           <span class="controlled-setting-indicator" pref="autofill.enabled">
           </span>
         </span>
       </label>
       <a is="action-link" id="autofill-settings"
           i18n-content="manageAutofillSettings"></a>
     </div>
     <div class="checkbox controlled-setting-with-label">
       <label>
         <input id="password-manager-enabled"
-            pref="profile.password_manager_enabled"
+            pref="credentials_enable_service"
             metric="Options_PasswordManager" type="checkbox">
         <span>
           <span i18n-content="passwordManagerEnabled"></span>
           <span class="controlled-setting-indicator"
-              pref="profile.password_manager_enabled"></span>
+              pref="credentials_enable_service"></span>
         </span>
       </label>
       <a is="action-link" id="manage-passwords" i18n-content="managePasswords">
       </a>
     </div>
 <if expr="is_macosx">
     <div id="mac-passwords-warning" i18n-content="macPasswordsWarning" hidden>
     </div>
 </if>
   </section>
@@ skipping 546 matching lines @@
       </button>
     </div>
   </section>
   </div>  <!-- advanced-settings-container -->
   </div>  <!-- advanced-settings -->
   <footer id="advanced-settings-footer">
     <a is="action-link" id="advanced-settings-expander"
         i18n-content="showAdvancedSettings"></a>
   </footer>
 </div>