Disable page_cycler_database on Mac. It looks like the perf bots are...

chrome/test/page_cycler/page_cycler_test.cc

 // Copyright (c) 2010 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.
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
@@ skipping 481 matching lines @@
 
 // http (localhost) tests
 PAGE_CYCLER_HTTP_TESTS("moz", MozHttp);
 PAGE_CYCLER_HTTP_TESTS("intl1", Intl1Http);
 PAGE_CYCLER_HTTP_TESTS("intl2", Intl2Http);
 PAGE_CYCLER_HTTP_TESTS("dom", DomHttp);
 PAGE_CYCLER_HTTP_TESTS("bloat", BloatHttp);
 
 // HTML5 database tests
 // These tests are _really_ slow on XP/Vista.
-#if !defined(OS_WIN)
+// crbug.com/53140: The Mac perf bot is not happy with this test suite either,
+// even though it doesn't seem to be a problem related to this test suite.
+#if !defined(OS_WIN) && !defined(OS_MAC)
 PAGE_CYCLER_DATABASE_TESTS("select-transactions",
                            SelectTransactions);
 PAGE_CYCLER_DATABASE_TESTS("select-readtransactions",
                            SelectReadTransactions);
 PAGE_CYCLER_DATABASE_TESTS("select-readtransactions-read-results",
                            SelectReadTransactionsReadResults);
 PAGE_CYCLER_DATABASE_TESTS("insert-transactions",
                            InsertTransactions);
 PAGE_CYCLER_DATABASE_TESTS("update-transactions",
                            UpdateTransactions);
 PAGE_CYCLER_DATABASE_TESTS("delete-transactions",
                            DeleteTransactions);
 PAGE_CYCLER_DATABASE_TESTS("pseudo-random-transactions",
                            PseudoRandomTransactions);
 #endif
 
 }  // namespace