Mark WorkerTest.WorkerMessagePortGC as flaky on mac.

content/worker/test/worker_uitest.cc

 // Copyright (c) 2011 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/file_path.h"
 #include "base/string_util.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/platform_thread.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/test/automation/automation_proxy.h"
@@ skipping 313 matching lines @@
 // Flaky, http://crbug.com/71518.
 TEST_F(WorkerTest, FLAKY_WorkerMapGc) {
   RunWorkerFastLayoutTest("wrapper-map-gc.html");
 }
 
 // http://crbug.com/101996 (started flaking with WebKit roll 98537:98582).
 TEST_F(WorkerTest, FLAKY_WorkerMessagePort) {
   RunWorkerFastLayoutTest("worker-messageport.html");
 }
 
-#if defined(OS_WIN) || defined(OS_LINUX)
 // http://crbug.com/101996 (started flaking with WebKit roll 98537:98582).
-#define WorkerMessagePortGC FLAKY_WorkerMessagePortGC
-#endif
-TEST_F(WorkerTest, WorkerMessagePortGC) {
+TEST_F(WorkerTest, FLAKY_WorkerMessagePortGC) {
   RunWorkerFastLayoutTest("worker-messageport-gc.html");
 }
 
 // http://crbug.com/101996 (started flaking with WebKit roll 98537:98582).
 TEST_F(WorkerTest, FLAKY_WorkerMultiPort) {
   RunWorkerFastLayoutTest("worker-multi-port.html");
 }
 
 // Flaky, http://crbug.com/76426.
 TEST_F(WorkerTest, FLAKY_WorkerNavigator) {
@@ skipping 539 matching lines @@
 }
 
 #if defined(OS_LINUX)
 // Fails on Linux due to an assert in WebKit's RNG.
 // See http://webkit.org/b/55728.
 #define FileWriterSyncWriteOverlapped DISABLED_FileWriterSyncWriteOverlapped
 #endif
 TEST_F(WorkerFileSystemTest, FileWriterSyncWriteOverlapped) {
   RunWorkerFileSystemLayoutTest("file-writer-sync-write-overlapped.html");
 }