value-set-view must select the 0th tab even if it is the only one

tracing/tracing/value/ui/value_set_view.html

Index: tracing/tracing/value/ui/value_set_view.html
diff --git a/tracing/tracing/value/ui/value_set_view.html b/tracing/tracing/value/ui/value_set_view.html
index 9a773957e749cf27222fc4ce8b2318baaa682f56..996d96b8cc152d901262d1d80e904a0a9dcbe682 100644
--- a/tracing/tracing/value/ui/value_set_view.html
+++ b/tracing/tracing/value/ui/value_set_view.html
@@ -16,7 +16,7 @@ found in the LICENSE file.
 
 <script>
 'use strict';
-tr.exportTo('tr.ui', function() {
+tr.exportTo('tr.v.ui', function() {
   var VALUE_SET_VIEW_ELEMENT_NAMES = [];
 
   var SELECTED_TAB_SETTINGS_KEY = 'tr-v-ui-value-set-view-element-name';
@@ -62,7 +62,8 @@ tr.exportTo('tr.ui', function() {
 
       if (this.$.container.children.length === 1) {
         this.$.container.tabsHidden = true;
-      } else if (this.$.container.selectedTab === undefined) {
+      }
+      if (this.$.container.selectedTab === undefined) {
         this.$.container.children[0].setAttribute('selected', true);
       }
     }
@@ -81,7 +82,8 @@ tr.exportTo('tr.ui', function() {
   }
 
   return {
-    registerValueSetView: registerValueSetView
+    registerValueSetView: registerValueSetView,
+    SELECTED_TAB_SETTINGS_KEY: SELECTED_TAB_SETTINGS_KEY
   };
 });
 </script>