Replace deprecated base::NonThreadSafe in jingle in favor of SequenceChecker.

jingle/notifier/base/weak_xmpp_client.cc

Index: jingle/notifier/base/weak_xmpp_client.cc
diff --git a/jingle/notifier/base/weak_xmpp_client.cc b/jingle/notifier/base/weak_xmpp_client.cc
index 7cec36e40020c68e5d8c1963ff451198f33bac67..48a5dc0947cd1e5cb6f2de3fedad19fa38d8bff6 100644
--- a/jingle/notifier/base/weak_xmpp_client.cc
+++ b/jingle/notifier/base/weak_xmpp_client.cc
@@ -13,12 +13,12 @@ WeakXmppClient::WeakXmppClient(rtc::TaskParent* parent)
       weak_ptr_factory_(this) {}
 
 WeakXmppClient::~WeakXmppClient() {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   Invalidate();
 }
 
 void WeakXmppClient::Invalidate() {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   // We don't want XmppClient raising any signals once its invalidated.
   SignalStateChange.disconnect_all();
   SignalLogInput.disconnect_all();
@@ -27,12 +27,12 @@ void WeakXmppClient::Invalidate() {
 }
 
 base::WeakPtr<WeakXmppClient> WeakXmppClient::AsWeakPtr() {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   return weak_ptr_factory_.GetWeakPtr();
 }
 
 void WeakXmppClient::Stop() {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   // We don't want XmppClient used after it has been stopped.
   Invalidate();
   buzz::XmppClient::Stop();