Revert "Indexed DB: Remove nonstandard IDBFactory.webkitGetDatabaseNames()"

content/test/data/indexeddb/corrupted_open_db_detection.html

Index: content/test/data/indexeddb/corrupted_open_db_detection.html
diff --git a/content/test/data/indexeddb/corrupted_open_db_detection.html b/content/test/data/indexeddb/corrupted_open_db_detection.html
index 076a2cc4115fd4565d71ffd13f96ea572d0c6379..d642d8182541fa4ed96d4878b837c5675304fffd 100644
--- a/content/test/data/indexeddb/corrupted_open_db_detection.html
+++ b/content/test/data/indexeddb/corrupted_open_db_detection.html
@@ -140,6 +140,24 @@ var tests = {
       request.onerror = requestError;
     });
   },
+  failWebkitGetDatabaseNames: function() {
+    tests.testCommon('readonly');
+    gotRequestError = 0;
+    db.onclose = function(event) {
+      shouldBe("numTransactionErrors", "0");
+      shouldBe("numTransactionAborts", "1");
+      shouldBe("gotRequestError", "1");
+
+      done("Closed as expected");
+    };
+    testXhr("/corrupt/test/fail?class=LevelDBIterator&method=Seek", function() {
+      request = window.indexedDB.webkitGetDatabaseNames();
+      request.onsuccess = unexpectedSuccessCallback;
+      request.onerror = function(evt) {
+        gotRequestError += 1;
+      };
+    });
+  },
   iterate: function() {
     testXhr("/corrupt/test/corruptdb?storeName", function() {
       tests.testCommon('readonly');