Add command in to swarming UI

appengine/swarming/ui/res/imp/taskpage/task-page.html

Index: appengine/swarming/ui/res/imp/taskpage/task-page.html
diff --git a/appengine/swarming/ui/res/imp/taskpage/task-page.html b/appengine/swarming/ui/res/imp/taskpage/task-page.html
index a9e715a36f5db1dd656482c4b872bab3aaf65e63..fe3866bda6d0fdff98c8fcfd5efa75d827e78877 100644
--- a/appengine/swarming/ui/res/imp/taskpage/task-page.html
+++ b/appengine/swarming/ui/res/imp/taskpage/task-page.html
@@ -308,6 +308,10 @@
                   <td class="code">[[_extraArgs(_request)]]</td>
                 </tr>
                 <tr>
+                  <td>Command</td>
+                  <td class="code">[[_command(_request)]]</td>
+                </tr>
+                <tr>
                   <td rowspan$="[[_rowspan(_request.tags)]]">Tags</td>
                 </tr>
                 <template is="dom-repeat" items="{{_request.tags}}" as="tag">
@@ -627,6 +631,14 @@
         return packages;
       },
 
+      _command: function(request) {
+        if (!request || !request.properties) {
+          return "";
+        }
+        var args = request.properties.command || [];
+        return args.join(" ");
+      },
+
       _disambiguate: function(taskId, result) {
         if (!taskId.endsWith("0") || !result) {
           return false;