feat(benchpress): add getStringParameter method to support text and radio inputs

tools/build/snippets/url_params_to_form.js

@@ -7,8 +7,14 @@
     var name = match[1];
     var value = match[2];
     var els = document.querySelectorAll('input[name="'+name+'"]');
+    var el;
     for (var i=0; i<els.length; i++) {
-      els[i].value = value;
+      el = els[i];
+      if (el.type === 'radio' || el.type === 'checkbox') {
+        el.checked = el.value === value;
+      } else {
+        el.value = value;
+      }
     }
   }
 })();