Disable RampUpTest.UpDownUpTransportSequenceNumberPacketLoss on Linux due to flakiness.

call/rampup_tests.cc

Index: call/rampup_tests.cc
diff --git a/call/rampup_tests.cc b/call/rampup_tests.cc
index 6ce2efd6ac58c14edbff4905c8b9e447729ee064..21fd361c4cd4abcbf28316f71e02bf1f05e3973a 100644
--- a/call/rampup_tests.cc
+++ b/call/rampup_tests.cc
@@ -584,7 +584,15 @@ TEST_F(RampUpTest, UpDownUpTransportSequenceNumberRtx) {
 
 // TODO(holmer): Tests which don't report perf stats should be moved to a
 // different executable since they per definition are not perf tests.
-TEST_F(RampUpTest, UpDownUpTransportSequenceNumberPacketLoss) {
+// Crashes on Linux only, see webrtc:7919.
+#if defined(WEBRTC_LINUX)
+#define MAYBE_UpDownUpTransportSequenceNumberPacketLoss \
+    DISABLED_UpDownUpTransportSequenceNumberPacketLoss
+#else
+#define MAYBE_UpDownUpTransportSequenceNumberPacketLoss \
+    UpDownUpTransportSequenceNumberPacketLoss
+#endif
+TEST_F(RampUpTest, MAYBE_UpDownUpTransportSequenceNumberPacketLoss) {
   std::vector<int> loss_rates = {20, 0, 0, 0};
   RampUpDownUpTester test(1, 0, 1, kStartBitrateBps,
                           RtpExtension::kTransportSequenceNumberUri, true,