Fix flaky PPAPITest.FileIO_NotAllowMixedReadWrite, re-enable

chrome/test/ui/ppapi_uitest.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/ui/ppapi_uitest.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/path_service.h"
@@ skipping 793 matching lines @@
 #if defined(OS_WIN)
 #define MAYBE_NACL_FileIO_TouchQuery DISABLED_FileIO_TouchQuery
 #else
 #define MAYBE_NACL_FileIO_TouchQuery MAYBE_FileIO_TouchQuery
 #endif
 
 TEST_PPAPI_NACL_VIA_HTTP(FileIO_Open)
 TEST_PPAPI_NACL_VIA_HTTP(FileIO_AbortCalls)
 TEST_PPAPI_NACL_VIA_HTTP(MAYBE_FileIO_ParallelReads)
 TEST_PPAPI_NACL_VIA_HTTP(FileIO_ParallelWrites)
-// crbug.com/134442
-TEST_PPAPI_NACL_VIA_HTTP(DISABLED_FileIO_NotAllowMixedReadWrite)
+TEST_PPAPI_NACL_VIA_HTTP(FileIO_NotAllowMixedReadWrite)
 TEST_PPAPI_NACL_VIA_HTTP(MAYBE_NACL_FileIO_TouchQuery)
 TEST_PPAPI_NACL_VIA_HTTP(MAYBE_FileIO_ReadWriteSetLength)
 // The following test requires PPB_FileIO_Trusted, not available in NaCl.
 TEST_PPAPI_NACL_VIA_HTTP(DISABLED_FileIO_WillWriteWillSetLength)
 
 TEST_PPAPI_IN_PROCESS_VIA_HTTP(FileRef)
 TEST_PPAPI_OUT_OF_PROCESS_VIA_HTTP(FileRef)
 TEST_PPAPI_NACL_VIA_HTTP(FileRef)
 
 TEST_PPAPI_IN_PROCESS_VIA_HTTP(FileSystem)
@@ skipping 286 matching lines @@
 TEST_PPAPI_OUT_OF_PROCESS(FlashMessageLoop_RunWithoutQuit)
 
 TEST_PPAPI_IN_PROCESS(MouseCursor)
 TEST_PPAPI_OUT_OF_PROCESS(MouseCursor)
 TEST_PPAPI_NACL_VIA_HTTP(MouseCursor)
 
 // Only enabled in out-of-process mode.
 TEST_PPAPI_OUT_OF_PROCESS(FlashFile_CreateTemporaryFile)
 
 #endif // ADDRESS_SANITIZER