Add IDB perf tests for random read, with and without an index.

chrome/test/data/indexeddb/perf_shared.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.
 
 window.indexedDB = window.indexedDB || window.webkitIndexedDB ||
     window.mozIndexedDB || window.msIndexedDB;
 
 var automation = {
   results: {}
 };
@@ skipping 22 matching lines @@
 
 function assert(t) {
   if (!t) {
     var e = new Error("Assertion failed!");
     console.log(e.stack);
     throw e;
   }
 }
 
 function onError(e) {
-  console.log(e);
+  var s = "Caught error.";
+  if (e.target && e.target.webkitErrorMessage)
+    s += "\n" + e.target.webkitErrorMessage;
+  console.log(s);
+  automation.setStatus(s);
   e.stopPropagation();
   throw new Error(e);
 }
 
 var version = 2;  // The version with our object stores.
-var db;
 
-function createDatabase(name, objectStores, handler, errorHandler) {
+// Valid options fields:
+//  indexName: the name of an index to create on each object store
+//  indexKeyPath: likewise
+//  indexIsUnique: the "unique" option for IDBIndexParameters
+//  indexIsMultiEntry: the "multiEntry" option for IDBIndexParameters
+//
+function createDatabase(
+    name, objectStoreNames, handler, errorHandler, options) {
   var openRequest = indexedDB.open(name, version);
   openRequest.onblocked = errorHandler;
   function createObjectStores(db) {
-    for (var store in objectStores) {
-      var name = objectStores[store];
+    for (var store in objectStoreNames) {
+      var name = objectStoreNames[store];
       assert(!db.objectStoreNames.contains(name));
-      db.createObjectStore(name);
+      var os = db.createObjectStore(name);
+      if (options && options.indexName) {
+        assert('indexKeyPath' in options);
+        os.createIndex(options.indexName, options.indexKeyPath,
+            { unique: options.indexIsUnique,
+              multiEntry: options.indexIsMultiEntry });
+      }
     }
   }
   openRequest.onupgradeneeded = function(ev) {
     // TODO: This is the spec-compliant path, which doesn't yet work in Chrome,
     // and isn't yet tested, as this function won't currently be called.
     assert(openRequest == ev.target);
-    db = openRequest.result;
-    createObjectStores(db);
+    createObjectStores(openRequest.result);
     // onsuccess will get called after this exits.
   };
   openRequest.onsuccess = function(ev) {
     assert(openRequest == ev.target);
-    db = openRequest.result;
+    var db = openRequest.result;
     db.onerror = function(ev) {
       console.log("db error", arguments, openRequest.webkitErrorMessage);
       errorHandler();
-    }
+    };
     if (db.version != version) {
       // This is the current Chrome path.
       var setVersionRequest = db.setVersion(version);
       setVersionRequest.onfailure = errorHandler;
-      setVersionRequest.onsuccess =
-          function(e) {
-            assert(setVersionRequest == e.target);
-            createObjectStores(db);
-            var versionTransaction = setVersionRequest.result;
-            versionTransaction.oncomplete = function() {handler(db); };
-            versionTransaction.onerror = onError;
-          }
+      setVersionRequest.onsuccess = function(e) {
+        assert(setVersionRequest == e.target);
+        createObjectStores(db);
+        var versionTransaction = setVersionRequest.result;
+        versionTransaction.oncomplete = function() {handler(db); };
+        versionTransaction.onerror = onError;
+      };
     } else {
       handler(db);
     }
   }
 }
 
 function getTransaction(db, objectStoreNames, mode, opt_handler) {
   var transaction = db.transaction(objectStoreNames, mode);
   transaction.onerror = onError;
   transaction.onabort = onError;
   if (opt_handler) {
     transaction.oncomplete = opt_handler;
   }
   return transaction;
 }
 
 function deleteDatabase(name, opt_handler) {
   var deleteRequest = indexedDB.deleteDatabase(name);
   deleteRequest.onerror = onError;
   if (opt_handler) {
     deleteRequest.onsuccess = opt_handler;
   }
 }
 
-function cleanUp(opt_handler) {
-  if (db) {
-    deleteDatabase(db, opt_handler);
-    db = null;
+function getCompletionFunc(testName, startTime, onTestComplete) {
+  function onDeleted() {
+    automation.setStatus("Deleted database.");
+    onTestComplete();
+  }
+  return function() {
+    var duration = Date.now() - startTime;
+    // Ignore the cleanup time for this test.
+    automation.addResult(testName, duration);
+    automation.setStatus("Deleting database.");
+    // TODO: Turn on actual deletion; for now it's way too slow.
+    // deleteDatabase(testName, onDeleted);
+    onTestComplete();
   }
 }
 
 function stringOfLength(n) {
   assert(n > 0);
   assert(n == Math.floor(n));
   return new Array(n + 1).join('0');
 }