IndexedDB: Update browser tests to test for IDB exception codes.

chrome/test/data/indexeddb/object_store_test.js

Index: chrome/test/data/indexeddb/object_store_test.js
diff --git a/chrome/test/data/indexeddb/object_store_test.js b/chrome/test/data/indexeddb/object_store_test.js
index c4a11579fc21b22a4f630e84de9216a57deeee47..7946c9a1fba3dca7d59be03671eeb835064e00b1 100644
--- a/chrome/test/data/indexeddb/object_store_test.js
+++ b/chrome/test/data/indexeddb/object_store_test.js
@@ -40,15 +40,26 @@ function getSuccess()
   result.onerror = unexpectedErrorCallback;
 }
 
-function dataAddedSuccess()
+function addWithSameKeyFailed()
 {
-  debug('Data added');
+  debug('Adding a record with same key failed');
+  shouldBe("event.code", "webkitIDBDatabaseException.CONSTRAINT_ERR");
 
   var result = objectStore.get(1);
   result.onsuccess = getSuccess;
   result.onerror = unexpectedErrorCallback;
 }
 
+function dataAddedSuccess()
+{
+  debug('Data added');
+
+  debug('Try to add employee with same id');
+  var result = objectStore.add({fname: "Tom", lname: "Jones", id: 1});
+  result.onsuccess = unexpectedSuccessCallback;
+  result.onerror = addWithSameKeyFailed;
+}
+
 function populateObjectStore()
 {
   debug('Populating object store');