Revert "Disable some PortAllocatorTest on tsan due to flakiness"

webrtc/p2p/client/portallocator_unittest.cc

Index: webrtc/p2p/client/portallocator_unittest.cc
diff --git a/webrtc/p2p/client/portallocator_unittest.cc b/webrtc/p2p/client/portallocator_unittest.cc
index b2d4eb26aa9b3f75a917f71fbc6e49fd9dd3e4c1..148623dfb3ccdea96be528e9ac64ffb9a1b954e9 100644
--- a/webrtc/p2p/client/portallocator_unittest.cc
+++ b/webrtc/p2p/client/portallocator_unittest.cc
@@ -472,10 +472,6 @@ TEST_F(PortAllocatorTest, TestDisableAdapterEnumerationMultipleInterfaces) {
   CheckDisableAdapterEnumeration();
 }
 
-// Disable for TSan v2, see
-// https://code.google.com/p/webrtc/issues/detail?id=4743 for details.
-#if !defined(THREAD_SANITIZER)
-
 // Test that we can get OnCandidatesAllocationDone callback when all the ports
 // are disabled.
 TEST_F(PortAllocatorTest, TestDisableAllPorts) {
@@ -513,8 +509,6 @@ TEST_F(PortAllocatorTest, TestGetAllPortsNoUdpSockets) {
   EXPECT_TRUE(candidate_allocation_done_);
 }
 
-#endif // if !defined(THREAD_SANITIZER)
-
 // Test that we don't crash or malfunction if we can't create UDP sockets or
 // listen on TCP sockets. We still give out a local TCP address, since
 // apparently this is needed for the remote side to accept our connection.