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

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

Index: chrome/browser/extensions/api/webrtc_audio_private/webrtc_audio_private_browsertest.cc
diff --git a/chrome/browser/extensions/api/webrtc_audio_private/webrtc_audio_private_browsertest.cc b/chrome/browser/extensions/api/webrtc_audio_private/webrtc_audio_private_browsertest.cc
index 692092aba8f5b2fac2e57aae8db16350d898f26a..5e813393cf951b6609a88fd4fe4aa6620ffc5739 100644
--- a/chrome/browser/extensions/api/webrtc_audio_private/webrtc_audio_private_browsertest.cc
+++ b/chrome/browser/extensions/api/webrtc_audio_private/webrtc_audio_private_browsertest.cc
@@ -357,7 +357,14 @@ IN_PROC_BROWSER_TEST_F(WebrtcAudioPrivateTest, GetAssociatedSink) {
   }
 }
 
-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());