Add a metrics table side panel

tracing/tracing/metrics/value_list.html

Index: tracing/tracing/metrics/value_list.html
diff --git a/tracing/tracing/metrics/value_list.html b/tracing/tracing/metrics/value_list.html
index 6533a20b197898280cf42bc7b6ed875bc4b20e44..f514baad3b4ea742bd5b717be191291802aa2113 100644
--- a/tracing/tracing/metrics/value_list.html
+++ b/tracing/tracing/metrics/value_list.html
@@ -23,6 +23,10 @@ tr.exportTo('tr.metrics', function() {
       return this.values_.map(function(v) { return v.asDict(); });
     },
 
+    map: function(cb, opt_this) {
+      return this.values_.map(cb, opt_this);
+    },
+
     getValuesWithName: function(name) {
       return this.values_.filter(function(value) {
         return value.name.indexOf(name) > -1;