Turn off OutOfProcessPPAPITest.PostMessage on Windows.

chrome/test/ui/ppapi_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_util.h"
 #include "base/path_service.h"
 #include "base/test/test_timeouts.h"
 #include "build/build_config.h"
 #include "content/common/content_switches.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 209 matching lines @@
 
 TEST_PPAPI_IN_PROCESS(VarDeprecated)
 // Disabled because it times out: http://crbug.com/89961
 //TEST_PPAPI_OUT_OF_PROCESS(VarDeprecated)
 
 // Windows defines 'PostMessage', so we have to undef it.
 #ifdef PostMessage
 #undef PostMessage
 #endif
 TEST_PPAPI_IN_PROCESS(PostMessage)
+#if !defined(OS_WIN)
+// Times out on Windows XP: http://crbug.com/95557
 TEST_PPAPI_OUT_OF_PROCESS(PostMessage)
+#endif
 
 TEST_PPAPI_IN_PROCESS(Memory)
 TEST_PPAPI_OUT_OF_PROCESS(Memory)
 
 TEST_PPAPI_IN_PROCESS(QueryPolicy)
 //TEST_PPAPI_OUT_OF_PROCESS(QueryPolicy)
 
 TEST_PPAPI_IN_PROCESS(VideoDecoder)
 TEST_PPAPI_OUT_OF_PROCESS(VideoDecoder)
 
@@ skipping 39 matching lines @@
 TEST_F(OutOfProcessPPAPITest, FAILS_Transport) {
   RunTestViaHTTP("Transport");
 }
 #endif // ENABLE_P2P_APIS
 
 TEST_PPAPI_IN_PROCESS(UMA)
 // There is no proxy.
 TEST_F(OutOfProcessPPAPITest, FAILS_UMA) {
   RunTest("UMA");
 }