Disable PhysicalSocketTest.TestUdpReadyToSendIPv4 on linux due to flakiness on the Linux64 Debug bo…

webrtc/base/physicalsocketserver_unittest.cc

Index: webrtc/base/physicalsocketserver_unittest.cc
diff --git a/webrtc/base/physicalsocketserver_unittest.cc b/webrtc/base/physicalsocketserver_unittest.cc
index f2eabcd66cf15f6b0f2f23d6a2b3d1978aaaa876..ad0d4657e880c4728b8076d63edadb0347810b80 100644
--- a/webrtc/base/physicalsocketserver_unittest.cc
+++ b/webrtc/base/physicalsocketserver_unittest.cc
@@ -216,8 +216,10 @@ TEST_F(PhysicalSocketTest, MAYBE_TestUdpIPv6) {
 // TODO(deadbeef): Enable again once test is reimplemented to be unflaky.
 // Also disable for ASan.
 // Disabled on Android: https://code.google.com/p/webrtc/issues/detail?id=4364
+// Disabled on Linux: https://bugs.chromium.org/p/webrtc/issues/detail?id=5233
 #if defined(THREAD_SANITIZER) || defined(MEMORY_SANITIZER) || \
-  defined(ADDRESS_SANITIZER) || defined(WEBRTC_ANDROID)
+    defined(ADDRESS_SANITIZER) || defined(WEBRTC_ANDROID) ||  \
+    defined(WEBRTC_LINUX)
 #define MAYBE_TestUdpReadyToSendIPv4 DISABLED_TestUdpReadyToSendIPv4
 #else
 #define MAYBE_TestUdpReadyToSendIPv4 TestUdpReadyToSendIPv4