Deprecate NonThreadSafe in remoting in favor of SequenceChecker.

remoting/host/continue_window.cc

Index: remoting/host/continue_window.cc
diff --git a/remoting/host/continue_window.cc b/remoting/host/continue_window.cc
index 9871591c9bbe9cd7545493405108f5ff7db6c39f..97446da79087df2bc1d8e3903d9c31531ae00aca 100644
--- a/remoting/host/continue_window.cc
+++ b/remoting/host/continue_window.cc
@@ -21,7 +21,7 @@ ContinueWindow::~ContinueWindow() {
 
 void ContinueWindow::Start(
     const base::WeakPtr<ClientSessionControl>& client_session_control) {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   DCHECK(!client_session_control_.get());
   DCHECK(client_session_control.get());
 
@@ -33,7 +33,7 @@ void ContinueWindow::Start(
 }
 
 void ContinueWindow::ContinueSession() {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   disconnect_timer_.Stop();
 
@@ -50,7 +50,7 @@ void ContinueWindow::ContinueSession() {
 }
 
 void ContinueWindow::DisconnectSession() {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   disconnect_timer_.Stop();
   if (client_session_control_.get())
@@ -60,7 +60,7 @@ void ContinueWindow::DisconnectSession() {
 ContinueWindow::ContinueWindow() {}
 
 void ContinueWindow::OnSessionExpired() {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   if (!client_session_control_.get())
     return;