Disable test PPAPITest.FileIO. Flaky on Mac.

chrome/test/ppapi/ppapi_browsertest.cc

 // 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.
 
 #include "chrome/test/ppapi/ppapi_test.h"
 
 #include "base/test/test_timeouts.h"
 #include "build/build_config.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 707 matching lines @@
       LIST_TEST(FileIO_RequestOSFileHandle) \
       LIST_TEST(FileIO_RequestOSFileHandleWithOpenExclusive) \
       LIST_TEST(FileIO_Mmap) \
   )
 
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS) && defined(USE_AURA)
 // TODO(erg): linux_aura bringup: http://crbug.com/318961
 #define MAYBE_FileIO DISABLED_FileIO
 #define MAYBE_FileIO_Private DISABLED_FileIO_Private
 #else
+// Flaky on Mac. http://crbug.com/377599
+# if defined(OS_MACOSX)
+#define MAYBE_FileIO DISABLED_FileIO
+# else
 #define MAYBE_FileIO FileIO
+# endif  // defined(OS_MACOSX)
 #define MAYBE_FileIO_Private FileIO_Private
 #endif
 
 IN_PROC_BROWSER_TEST_F(PPAPITest, MAYBE_FileIO) {
   RUN_FILEIO_SUBTESTS;
 }
 IN_PROC_BROWSER_TEST_F(PPAPIPrivateTest, MAYBE_FileIO_Private) {
   RUN_FILEIO_PRIVATE_SUBTESTS;
 }
 IN_PROC_BROWSER_TEST_F(OutOfProcessPPAPITest, MAYBE_FileIO) {
@@ skipping 624 matching lines @@
           LIST_TEST(FlashDRM_GetHmonitor)
           LIST_TEST(FlashDRM_GetVoucherFile));
 }
 
 TEST_PPAPI_IN_PROCESS(TalkPrivate)
 TEST_PPAPI_OUT_OF_PROCESS(TalkPrivate)
 
 #if defined(OS_CHROMEOS)
 TEST_PPAPI_OUT_OF_PROCESS(OutputProtectionPrivate)
 #endif