Disable a flaky test CastNavigationBrowserTest.AudioPlaybackWavPcm

Bug: 813481
Change-Id: I63ca84f2e191082b2685aafdaaa5fed5072221e6
TBR: halliwell@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/923745
Commit-Queue: Takeshi Yoshino <tyoshino@chromium.org>
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Reviewed-by: Takeshi Yoshino <tyoshino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537607}

chromecast/browser/test/cast_navigation_browsertest.cc

@@ -76,7 +76,9 @@ IN_PROC_BROWSER_TEST_F(CastNavigationBrowserTest, EmptyTest) {
   LoadAboutBlank();
 }
 
-IN_PROC_BROWSER_TEST_F(CastNavigationBrowserTest, AudioPlaybackWavPcm) {
+// Disabled due to flakiness. See crbug.com/813481.
+IN_PROC_BROWSER_TEST_F(CastNavigationBrowserTest,
+                       DISABLED_AudioPlaybackWavPcm) {
   PlayAudio("bear_pcm.wav");
 }