Initial checkin of a perf test suite for Indexed Database. This just has a

chrome/test/data/indexeddb/perf_test.js

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var overallTestStartTime = Date.now();
+
+function testCreateKeysInStores(
+    numKeys, numStores, payloadLength, onTestComplete) {
+  var testName = "testCreateKeysInStores_" + numKeys + "_" + numStores + "_" +
+      payloadLength;
+  assert(numKeys >= 0);
+  assert(numStores >= 1);
+  var objectStoreNames = [];
+  for (var i=0; i < numStores; ++i) {
+    objectStoreNames.push("store " + i);
+  }
+  var value = stringOfLength(payloadLength);
+  var start;
+
+  function onCreated(db) {
+    automation.setStatus("Constructing transaction.");
+    start = Date.now(); // Ignore the setup time for this test.
+    var transaction = getTransaction(db, objectStoreNames, "readwrite",
+        function() { onTransactionComplete(db); });
+    for (var i in objectStoreNames) {
+      var os = transaction.objectStore(objectStoreNames[i]);
+      assert(os);
+      for (var j = 0; j < numKeys; ++j) {
+        os.put("key " + j, value);
+      }
+    }
+  }
+  function onTransactionComplete(db) {
+    var duration = Date.now() - start;
+    // Ignore the cleanup time for this test.
+    automation.addResult(testName, duration);
+    automation.setStatus("Deleting.");
+    deleteDatabase(db, onDeleted);
+  }
+  function onDeleted() {
+    automation.setStatus("Deleted.");
+    onTestComplete();
+  }
+  automation.setStatus("Creating.");
+  createDatabase(testName, objectStoreNames, onCreated, onError);
+}
+
+var tests = [
+  [testCreateKeysInStores, 1,    1,    1],
+  [testCreateKeysInStores, 100,  1,    1],
+  [testCreateKeysInStores, 1,    100,  1],
+  [testCreateKeysInStores, 100,  1,    100000]
+];
+
+var currentTest = 0;
+
+function runNextTest() {
+  if (currentTest < tests.length) {
+    var test = tests[currentTest++].slice();
+    var f = test.shift();
+    test.push(runNextTest);
+    f.apply(null, test);
+  } else {
+    onAllTestsComplete();
+  }
+}
+
+function onAllTestsComplete() {
+  var overallDuration = Date.now() - overallTestStartTime;
+  automation.addResult("OverallTestDuration", overallDuration);
+  automation.setDone();
+}
+
+function test() {
+  runNextTest();
+}