Replace rtc::CryptString with std::string

jingle/notifier/base/xmpp_connection_unittest.cc

Index: jingle/notifier/base/xmpp_connection_unittest.cc
diff --git a/jingle/notifier/base/xmpp_connection_unittest.cc b/jingle/notifier/base/xmpp_connection_unittest.cc
index 4e07fcf76f2f251ff20ab324066c0bc1ee96b8aa..28a0d713c7188715709171bc4f534f46587f29f8 100644
--- a/jingle/notifier/base/xmpp_connection_unittest.cc
+++ b/jingle/notifier/base/xmpp_connection_unittest.cc
@@ -30,7 +30,6 @@ class Jid;
 }  // namespace buzz
 
 namespace rtc {
-class CryptString;
 class SocketAddress;
 class Task;
 }  // namespace rtc
@@ -52,7 +51,7 @@ class MockPreXmppAuth : public buzz::PreXmppAuth {
   MOCK_METHOD5(StartPreXmppAuth,
                void(const buzz::Jid&,
                     const rtc::SocketAddress&,
-                    const rtc::CryptString&,
+                    const std::string&,
                     const std::string&,
                     const std::string&));
   MOCK_CONST_METHOD0(IsAuthDone, bool());