Disable flaky test EndToEndTest.TestFlexfecRtpStatePreservation on linux for now.

webrtc/video/end_to_end_tests.cc

Index: webrtc/video/end_to_end_tests.cc
diff --git a/webrtc/video/end_to_end_tests.cc b/webrtc/video/end_to_end_tests.cc
index c4a0ba27cdab4e7e1e43476e1e3e80849e6abc41..48c82f798bedb3a1cec21fc5c3dd5be615ec5e15 100644
--- a/webrtc/video/end_to_end_tests.cc
+++ b/webrtc/video/end_to_end_tests.cc
@@ -4145,7 +4145,16 @@ TEST_F(EndToEndTest, MAYBE_PictureIdStateRetainedAfterReinitingVp8) {
   TestPictureIdStatePreservation(encoder.get());
 }
 
-TEST_F(EndToEndTest, TestFlexfecRtpStatePreservation) {
+// This test is flaky on linux_memcheck. Disable on all linux bots until
+// flakyness has been fixed.
+// https://bugs.chromium.org/p/webrtc/issues/detail?id=7737
+#if defined(WEBRTC_LINUX)
+#define MAYBE_TestFlexfecRtpStatePreservation \
+  DISABLED_TestFlexfecRtpStatePreservation
+#else
+#define MAYBE_TestFlexfecRtpStatePreservation TestFlexfecRtpStatePreservation
+#endif
+TEST_F(EndToEndTest, MAYBE_TestFlexfecRtpStatePreservation) {
   class RtpSequenceObserver : public test::RtpRtcpObserver {
    public:
     RtpSequenceObserver()