Disable RampUpTest.UpDownUp* in webrtc_perf_tests on Mac

webrtc/call/rampup_tests.cc

Index: webrtc/call/rampup_tests.cc
diff --git a/webrtc/call/rampup_tests.cc b/webrtc/call/rampup_tests.cc
index ace90f45e83469beb3e92a88530dd58fb945733a..be84fcb65f29e76780b79e83ee1bcf494d302610 100644
--- a/webrtc/call/rampup_tests.cc
+++ b/webrtc/call/rampup_tests.cc
@@ -414,6 +414,9 @@ TEST_F(RampUpTest, SingleStreamWithHighStartBitrate) {
   RunBaseTest(&test, FakeNetworkPipe::Config());
 }
 
+// Disabled on Mac due to flakiness, see
+// https://bugs.chromium.org/p/webrtc/issues/detail?id=5407
+#ifndef WEBRTC_MAC
 TEST_F(RampUpTest, UpDownUpOneStream) {
   RampUpDownUpTester test(1, 60000, RtpExtension::kAbsSendTime, false, false);
   RunBaseTest(&test, FakeNetworkPipe::Config());
@@ -443,6 +446,7 @@ TEST_F(RampUpTest, UpDownUpThreeStreamsByRedRtx) {
   RampUpDownUpTester test(3, 60000, RtpExtension::kAbsSendTime, true, true);
   RunBaseTest(&test, FakeNetworkPipe::Config());
 }
+#endif
 
 TEST_F(RampUpTest, AbsSendTimeSingleStream) {
   RampUpTester test(1, 0, 0, RtpExtension::kAbsSendTime, false, false);