Disabling a flaky WebrtcAudioPrivateTest.TriggerEvent test on Windows, ChromeOS.

chrome/browser/extensions/api/webrtc_audio_private/webrtc_audio_private_browsertest.cc

 // Copyright 2013 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/json/json_writer.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/platform_thread.h"
@@ skipping 339 matching lines @@
     scoped_ptr<base::Value> result(
         RunFunctionAndReturnSingleResult(function.get(),
                                          parameter_string,
                                          browser()));
     std::string result_string;
     JSONWriter::Write(*result, &result_string);
     VLOG(2) << "Results: " << result_string;
   }
 }
 
-IN_PROC_BROWSER_TEST_F(WebrtcAudioPrivateTest, TriggerEvent) {
+// Times out frequently on Windows, CrOS: http://crbug.com/517112
+#if defined(OS_WIN) || defined(OS_CHROMEOS)
+#define MAYBE_TriggerEvent DISABLED_TriggerEvent
+#else
+#define MAYBE_TriggerEvent TriggerEvent
+#endif
+
+IN_PROC_BROWSER_TEST_F(WebrtcAudioPrivateTest, MAYBE_TriggerEvent) {
   WebrtcAudioPrivateEventService* service =
       WebrtcAudioPrivateEventService::GetFactoryInstance()->Get(profile());
 
   // Just trigger, without any extension listening.
   service->OnDevicesChanged(base::SystemMonitor::DEVTYPE_AUDIO_CAPTURE);
 
   // Now load our test extension and do it again.
   const extensions::Extension* extension = LoadExtension(
       test_data_dir_.AppendASCII("webrtc_audio_private_event_listener"));
   service->OnDevicesChanged(base::SystemMonitor::DEVTYPE_AUDIO_CAPTURE);
@@ skipping 46 matching lines @@
   title_watcher.AlsoWaitForTitle(base::ASCIIToUTF16("failure"));
   base::string16 result = title_watcher.WaitAndGetTitle();
   EXPECT_EQ(base::ASCIIToUTF16("success"), result);
 
   g_browser_process->webrtc_log_uploader()->OverrideUploadWithBufferForTesting(
       NULL);
 }
 #endif  // defined(GOOGLE_CHROME_BUILD) || defined(ENABLE_HANGOUT_SERVICES_EXTENSION)
 
 }  // namespace extensions