Disable WebRtcBrowserTest.NegotiateNonCryptoCall on Mac

TBR=chfremer@chromium.org

Bug: 810321
Change-Id: Ia12ba855ab9fb8e66c9d48c8e66cf91f76f72e08
Reviewed-on: https://chromium-review.googlesource.com/908461Reviewed-by: Olga Sharonova <olka@chromium.org>
Commit-Queue: Olga Sharonova <olka@chromium.org>
Cr-Commit-Position: refs/heads/master@{#535381}

content/browser/webrtc/webrtc_browsertest.cc

@@ -177,7 +177,13 @@ IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcBrowserTest,
 
 // This test will modify the SDP offer to use no encryption, which should
 // cause SetLocalDescription to fail.
-IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcBrowserTest, NegotiateNonCryptoCall) {
+// Flaky on MAC: http://crbug/810321.
+#if defined(OS_MACOSX)
+#define MAYBE_NegotiateNonCryptoCall DISABLED_NegotiateNonCryptoCall
+#else
+#define MAYBE_NegotiateNonCryptoCall NegotiateNonCryptoCall
+#endif
+IN_PROC_BROWSER_TEST_F(MAYBE_WebRtcBrowserTest, MAYBE_NegotiateNonCryptoCall) {
   MakeTypicalPeerConnectionCall("negotiateNonCryptoCall();");
 }