Use kMetricsReportingEnabled instead of kStatsReporingPref on metrics side

chrome/browser/resources/options/browser_options.html

 <div id="settings" class="page" hidden>
   <header>
     <h1 i18n-content="settingsTitle"></h1>
   </header>
   <include src="reset_profile_settings_banner.html">
   <include src="automatic_settings_reset_banner.html">
 <if expr="chromeos">
   <link rel="import" href="chrome://resources/cr_elements/v1_0/network/cr_network_icon.html">
   <link rel="import" href="chrome://resources/cr_elements/v1_0/network/cr_onc_types.html">
   <include src="secondary_user_banner.html">
@@ skipping 414 matching lines @@
             <span i18n-content="spellingPref"></span>
             <span id="spelling-enabled-indicator"
                 class="controlled-setting-indicator"
                 pref="spellcheck.use_spelling_service" dialog-pref>
             </span>
         </label>
       </div>
 <if expr="_google_chrome">
       <div id="metrics-reporting-setting"
           class="checkbox controlled-setting-with-label">
-<if expr="chromeos">
-        <label>
-          <input id="metrics-reporting-enabled"
-              pref="cros.metrics.reportingEnabled" type="checkbox">
-          <span>
-            <span i18n-content="enableLogging"></span>
-            <span class="controlled-setting-indicator"
-                pref="cros.metrics.reportingEnabled"></span>
-          </span>
-        </label>
-</if>
-<if expr="not chromeos">
         <label>
           <input id="metrics-reporting-enabled" type="checkbox">
           <span>
             <span i18n-content="enableLogging"></span>
             <span id="metrics-reporting-disabled-icon"
                 class="controlled-setting-indicator"></span>
           </span>
         </label>
+<if expr="not chromeos">
         <span id="metrics-reporting-reset-restart" hidden>
           <!-- Text filled by JavaScript -->
           <span></span><a is="action-link" role="button"
               class="standalone-action-link"></a><span></span>
         </span>
-</if>
+</if>  <!-- not chromeos -->
       </div>
 </if>  <!-- _google_chrome -->
       <div class="checkbox">
         <label>
           <input id="do-not-track-enabled" pref="enable_do_not_track"
               metric="Options_DoNotTrackCheckbox" type="checkbox" dialog-pref>
           <span i18n-content="doNotTrack"></span>
         </label>
       </div>
 <if expr="chromeos">
@@ skipping 556 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>