Replace rtc::CryptString with std::string

third_party/libjingle_xmpp/xmpp/prexmppauth.h

Index: third_party/libjingle_xmpp/xmpp/prexmppauth.h
diff --git a/third_party/libjingle_xmpp/xmpp/prexmppauth.h b/third_party/libjingle_xmpp/xmpp/prexmppauth.h
index 92cb6db62a6a731268402ee019738cf94c5d78c7..89d327bca5216f892b576cc9335c6b16619440fe 100644
--- a/third_party/libjingle_xmpp/xmpp/prexmppauth.h
+++ b/third_party/libjingle_xmpp/xmpp/prexmppauth.h
@@ -12,7 +12,6 @@
 #define WEBRTC_LIBJINGLE_XMPP_PREXMPPAUTH_H_
 
 #include "third_party/libjingle_xmpp/xmpp/saslhandler.h"
-#include "third_party/webrtc/base/cryptstring.h"
 #include "third_party/webrtc/base/sigslot.h"
 
 namespace rtc {
@@ -51,7 +50,7 @@ public:
   virtual void StartPreXmppAuth(
     const Jid& jid,
     const rtc::SocketAddress& server,
-    const rtc::CryptString& pass,
+    const std::string& pass,
     const std::string& auth_mechanism,
     const std::string& auth_token) = 0;