Add cache test.

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;
 window.IDBKeyRange = window.IDBKeyRange || window.webkitIDBKeyRange;
 
 var automation = {
   results: {}
@@ skipping 260 matching lines @@
     getValue = getSimpleValue;
   for (var i in objectStoreNames) {
     var os = transaction.objectStore(objectStoreNames[i]);
     for (var j = 0; j < numKeys; ++j) {
       var request = os.put(getValue(j), getKey(j));
       request.onerror = onError;
     }
   }
 }
 
+function verifyResultNonNull(result) {
+  assert(result != null);
+}
+
 function getRandomValues(
     transaction, objectStoreNames, numReads, numKeys, indexName, getKey) {
   if (!getKey)
     getKey = getSimpleKey;
   for (var i in objectStoreNames) {
     var os = transaction.objectStore(objectStoreNames[i]);
     var source = os;
     if (indexName)
       source = source.index(indexName);
     for (var j = 0; j < numReads; ++j) {
       var rand = Math.floor(Math.random() * numKeys);
       var request = source.get(getKey(rand));
       request.onerror = onError;
+      request.onsuccess = verifyResultNonNull;
     }
   }
 }
 
 function putRandomValues(
     transaction, objectStoreNames, numPuts, numKeys, getKey, getValue) {
   if (!getKey)
     getKey = getSimpleKey;
   if (!getValue)
     getValue = getSimpleValue;
   for (var i in objectStoreNames) {
     var os = transaction.objectStore(objectStoreNames[i]);
     for (var j = 0; j < numPuts; ++j) {
       var rand = Math.floor(Math.random() * numKeys);
       var request = os.put(getValue(rand), getKey(rand));
       request.onerror = onError;
     }
   }
 }
 
+function getSpecificValues(transaction, objectStoreNames, indexName, keys) {
+  for (var i in objectStoreNames) {
+    var os = transaction.objectStore(objectStoreNames[i]);
+    var source = os;
+    if (indexName)
+      source = source.index(indexName);
+    for (var j = 0; j < keys.length; ++j) {
+      var request = source.get(keys[j]);
+      request.onerror = onError;
+      request.onsuccess = verifyResultNonNull;
+    }
+  }
+}
+
 // getKey should be deterministic, as we assume that a cursor that starts at
 // getKey(X) and runs through getKey(X + K) has exactly K values available.
 // This is annoying to guarantee generally when using an index, so we avoid both
 // ends of the key space just in case and use simple indices.
 // TODO(ericu): Figure out if this can be simplified and we can remove uses of
 // getObjectValue in favor of getNFieldObjectValue.
 function getValuesFromCursor(
     transaction, inputObjectStoreName, numReads, numKeys, indexName, getKey,
     readKeysOnly, outputObjectStoreName) {
   assert(2 * numReads < numKeys);
@@ skipping 29 matching lines @@
         // outside its range.
         oos.put(cursor.value, numKeys + Math.random());
       values.push({key: cursor.key, value: cursor.value});
       cursor.continue();
     } else {
       assert(!numReadsLeft);
     }
   }
   request.onerror = onError;
 }
+
+function runTransactionBatch(db, count, batchFunc, objectStoreNames, mode,
+    onComplete) {
+  var numTransactionsRunning = 0;
+
+  runOneBatch(db);
+
+  function runOneBatch(db) {
+    if (count <= 0) {
+      return;
+    }
+    --count;
+    ++numTransactionsRunning;
+    var transaction = getTransaction(db, objectStoreNames, mode,
+        function() {
+          assert(!--numTransactionsRunning);
+          if (count <= 0) {
+            onComplete();
+          } else {
+            runOneBatch(db);
+          }
+        });
+
+    batchFunc(transaction);
+  }
+}
+