Options: Style cleanup - id attribute first.

chrome/browser/resources/options/browser_options.html

 <div id="browserPage" class="page" hidden>
   <h1 i18n-content="browserPage"></h1>
   <section id="startupSection">
     <h3 i18n-content="startupGroupName"></h3>
     <div>
       <div class="radio">
         <label>
           <input type="radio" name="startup" pref="session.restore_on_startup"
               value="0" metric="Options_Startup_Homepage">
           <span i18n-content="startupShowDefaultAndNewTab"></span>
         </label>
       </div>
       <div class="radio">
         <label>
           <input type="radio" name="startup" pref="session.restore_on_startup"
               value="1" metric="Options_Startup_LastSession">
           <span i18n-content="startupShowLastSession"></span>
         </label>
       </div>
       <div class="radio">
         <label>
-          <input type="radio" name="startup" id="startupShowPagesButton"
+          <input id="startupShowPagesButton" type="radio" name="startup"
               pref="session.restore_on_startup" value="4"
               metric="Options_Startup_Custom">
           <span id="startupShowPagesLabel"
               i18n-content="startupShowPages"></span>
         </label>
       </div>
       <div class="suboption">
         <div id="startupPageManagement" class="settings-list">
           <list id="startupPagesList"></list>
           <div>
             <button id="startupUseCurrentButton"
                 i18n-content="startupUseCurrent"></button>
           </div>
         </div>
       </div>
     </div>
   </section>
   <section>
     <h3 i18n-content="homepageGroupName"></h3>
     <div>
       <div class="radio">
         <label>
-          <input type="radio" name="homepage" id="homepageUseNTPButton"
+          <input id="homepageUseNTPButton" type="radio" name="homepage"
               value="true" metric="Options_Homepage_IsNewTabPage">
           <span i18n-content="homepageUseNewTab"></span>
         </label>
       </div>
       <div id="customHomePageGroup">
         <div class="radio">
           <label>
-            <input type="radio" name="homepage" id="homepageUseURLButton"
+            <input id="homepageUseURLButton" type="radio" name="homepage"
                 value="false" metric="Options_Homepage_IsNewTabPage">
             <span i18n-content="homepageUseURL"></span>
           </label>
         </div>
         <div>
           <input id="homepageURL" class="favicon-cell" type="url">
         </div>
       </div>
     </div>
   </section>
@@ skipping 18 matching lines @@
     </div>
   </section>
   <section>
     <h3 i18n-content="defaultSearchGroupName"></h3>
       <div id="defaultSearchEngineGroup">
         <div>
           <select id="defaultSearchEngine"></select>
           <button id="defaultSearchManageEnginesButton"
               i18n-content="defaultSearchManageEngines"></button>
         </div>
-        <div class="checkbox" id="instantOption">
+        <div id="instantOption" class="checkbox">
           <label>
             <!-- TODO(estade): metric? -->
-            <input type="checkbox" id="instantEnableCheckbox"
+            <input id="instantEnableCheckbox" type="checkbox"
                 pref="instant.enabled">
             <span i18n-content="instantName"></span>
           </label>
         </div>
         <div class="suboption informational-text">
           <span i18n-content="instantWarningText"></span>
           <a target="_blank" i18n-values="href:instantLearnMoreLink"
              i18n-content="learnMore"></a>
         </div>
       </div>
   </section>
 <if expr="not pp_ifdef('chromeos')">
   <section>
     <h3 i18n-content="defaultBrowserGroupName"></h3>
     <div>
       <button id="defaultBrowserUseAsDefaultButton"
           i18n-content="defaultBrowserUseAsDefault"></button>
       <div id="defaultBrowserState"
           i18n-content="defaultBrowserUnknown"></div>
     </div>
   </section>
 </if>
 </div>