Fixing and re-enabling some flaky PeerConnection tests.

talk/app/webrtc/peerconnectionendtoend_unittest.cc

 /*
  * libjingle
  * Copyright 2013 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 212 matching lines @@
 // https://bugs.chromium.org/p/webrtc/issues/detail?id=5231 for details.
 #if !defined(THREAD_SANITIZER) && !defined(WEBRTC_MAC)
 TEST_F(PeerConnectionEndToEndTest, Call) {
   CreatePcs();
   GetAndAddUserMedia();
   Negotiate();
   WaitForCallEstablished();
 }
 #endif // if !defined(THREAD_SANITIZER) && !defined(WEBRTC_MAC)
 
-// Disabled per b/14899892
-TEST_F(PeerConnectionEndToEndTest, DISABLED_CallWithLegacySdp) {
+TEST_F(PeerConnectionEndToEndTest, CallWithLegacySdp) {
   FakeConstraints pc_constraints;
   pc_constraints.AddMandatory(MediaConstraintsInterface::kEnableDtlsSrtp,
                               false);
   CreatePcs(&pc_constraints);
   GetAndAddUserMedia();
   Negotiate();
   WaitForCallEstablished();
 }
 
 // Verifies that a DataChannel created before the negotiation can transition to
@@ skipping 150 matching lines @@
   CloseDataChannels(caller_dc, callee_signaled_data_channels_, 0);
 
   // Create a new channel and ensure it works after closing the previous one.
   caller_dc = caller_->CreateDataChannel("data2", init);
 
   WaitForDataChannelsToOpen(caller_dc, callee_signaled_data_channels_, 1);
   TestDataChannelSendAndReceive(caller_dc, callee_signaled_data_channels_[1]);
 
   CloseDataChannels(caller_dc, callee_signaled_data_channels_, 1);
 }