Add try selector to go/d8perf and go/retraceperf

Change-Id: Ia77eb88bc3c7bf1ef8513eaad0448648ededdf2c
diff --git a/tools/perf/d8.html b/tools/perf/d8.html
index 0ae6883..2f8d30c 100644
--- a/tools/perf/d8.html
+++ b/tools/perf/d8.html
@@ -6,6 +6,10 @@
   <link rel="stylesheet" href="stylesheet.css">
 </head>
 <body>
+  <div id="try-selector">
+    <input type="checkbox" id="try-checkbox" name="try-selector" checked>
+    <label for="try-checkbox">Try</label>
+  </div>
   <div id="runtime-fn">
     <input type="radio" id="runtime-min" name="runtime-fn" checked>
     <label for="runtime-min">Min</label>
diff --git a/tools/perf/retrace.html b/tools/perf/retrace.html
index 269fff5..df64da7 100644
--- a/tools/perf/retrace.html
+++ b/tools/perf/retrace.html
@@ -6,6 +6,10 @@
   <link rel="stylesheet" href="stylesheet.css">
 </head>
 <body>
+  <div id="try-selector">
+    <input type="checkbox" id="try-checkbox" name="try-selector" checked>
+    <label for="try-checkbox">Try</label>
+  </div>
   <div id="runtime-fn">
     <input type="radio" id="runtime-min" name="runtime-fn" checked>
     <label for="runtime-min">Min</label>