Add url filter to idb perf tests

chrome/test/data/indexeddb/perf_test.js

Index: chrome/test/data/indexeddb/perf_test.js
diff --git a/chrome/test/data/indexeddb/perf_test.js b/chrome/test/data/indexeddb/perf_test.js
index 708fc3f625b1286f9defbc7c16abc227357b5c3a..f22c305bf917ac06a4868919d034608c966556b1 100644
--- a/chrome/test/data/indexeddb/perf_test.js
+++ b/chrome/test/data/indexeddb/perf_test.js
@@ -89,9 +89,14 @@ function test() {
 }
 
 function runNextTest() {
-  if (currentTest < tests.length) {
+  var filter = window.location.hash.slice(1);
+  do {
     var test = tests[currentTest++].slice();
     var f = test.shift();
+  } while (currentTest < tests.length &&
+           filter && f.name != filter)
+
+  if (currentTest < tests.length) {
     test.push(runNextTest);
     f.apply(null, test);
   } else {