Add third-party VPN support to network details dialog

chrome/browser/resources/options/chromeos/internet_detail.html

 <div id="details-internet-page" class="page" hidden>
   <div class="close-button"></div>
   <!-- Network header -->
   <div id="network-details-header">
     <div id="network-details-title"></div>
     <div id="network-details-subtitle">
       <span id="network-details-subtitle-status"></span>
       <span id="network-details-subtitle-separator"> - </span>
       <span id="network-details-subtitle-type"></span>
     </div>
@@ skipping 185 matching lines @@
             <td id="wimax-shared-network" class="option-name"
                 i18n-content="inetNetworkShared">
             </td>
           </tr>
         </table>
       </section>
     </div>
     <div id="vpn-tab" class="subpages-tab-contents vpn-details">
       <section>
         <table class="option-control-table">
-          <tr class="auto-connect-network">
+          <tr class="auto-connect-network built-in-vpn-provider-only">
             <td>
               <div class="checkbox controlled-setting-with-label">
                 <label>
                   <input id="auto-connect-network-vpn" type="checkbox">
                   <span>
                     <span i18n-content="inetAutoConnectNetwork"></span>
                     <span class="controlled-setting-indicator"
                           managed="VPN.AutoConnect"
                           internet-detail-for="auto-connect-network-vpn"></span>
                   </span>
                 </label>
               </div>
             </td>
           </tr>
           <tr>
             <td class="option-name" i18n-content="inetServiceName"></td>
             <td id="inet-service-name" class="option-value"></td>
           </tr>
-          <tr>
+          <tr class="built-in-vpn-provider-only">
             <td class="option-name" i18n-content="inetServerHostname"></td>
             <td>
               <input class="option-value" id="inet-server-hostname"></input>
               <span class="controlled-setting-indicator"
                     managed="VPN.Host"
                     internet-detail-for="inet-server-hostname"></span>
             </td>
           </tr>
           <tr>
             <td class="option-name" i18n-content="inetProviderType"></td>
             <td id="inet-provider-type" class="option-value"></td>
           </tr>
-          <tr>
+          <tr class="third-party-vpn-provider-only">
+            <td class="option-name" i18n-content="inetProviderName"></td>
+            <td id="inet-provider-name" class="option-value"></td>
+          </tr>
+          <tr class="built-in-vpn-provider-only">
             <td class="option-name" i18n-content="inetUsername"></td>
             <td id="inet-username" class="option-value"></td>
           </tr>
         </table>
       </section>
     </div>
     <div id="cellular-conn-tab" class="subpages-tab-contents cellular-details">
       <section id="cellular-network-options">
         <table class="option-control-table">
           <tr>
@@ skipping 439 matching lines @@
       <button id="details-internet-disconnect" i18n-content="disconnectButton">
       </button>
       <button id="details-internet-configure" i18n-content="configureButton">
       </button>
       <button id="activate-details" i18n-content="activateButton"></button>
       <button id="view-account-details" i18n-content="viewAccountButton">
       </button>
     </div>
   </div>
 </div>