Deprecate NonThreadSafe in remoting in favor of SequenceChecker.

remoting/protocol/ice_connection_to_host.cc

Index: remoting/protocol/ice_connection_to_host.cc
diff --git a/remoting/protocol/ice_connection_to_host.cc b/remoting/protocol/ice_connection_to_host.cc
index 4fa7eae06a6648dc1720ef61a5541169340f140e..be42deaea1e5b2b8c2993ab44f6041db3ef048c9 100644
--- a/remoting/protocol/ice_connection_to_host.cc
+++ b/remoting/protocol/ice_connection_to_host.cc
@@ -28,7 +28,9 @@ namespace remoting {
 namespace protocol {
 
 IceConnectionToHost::IceConnectionToHost() {}
-IceConnectionToHost::~IceConnectionToHost() {}
+IceConnectionToHost::~IceConnectionToHost() {
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+}
 
 void IceConnectionToHost::Connect(
     std::unique_ptr<Session> session,
@@ -88,7 +90,7 @@ void IceConnectionToHost::InitializeAudio(
 }
 
 void IceConnectionToHost::OnSessionStateChange(Session::State state) {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   DCHECK(event_callback_);
 
   switch (state) {
@@ -216,7 +218,7 @@ void IceConnectionToHost::CloseChannels() {
 }
 
 void IceConnectionToHost::SetState(State state, ErrorCode error) {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   // |error| should be specified only when |state| is set to FAILED.
   DCHECK(state == FAILED || error == OK);