[Cast Channel] Add support for nonce challenge to Cast channel authentication.

extensions/browser/api/cast_channel/cast_socket_unittest.cc

Index: extensions/browser/api/cast_channel/cast_socket_unittest.cc
diff --git a/extensions/browser/api/cast_channel/cast_socket_unittest.cc b/extensions/browser/api/cast_channel/cast_socket_unittest.cc
index 2f99de049e2e2157c6a0c8d0df5da5e399d34c5c..5a857b2cd9e8c582f4dc70fec795e63f6bf7ef4a 100644
--- a/extensions/browser/api/cast_channel/cast_socket_unittest.cc
+++ b/extensions/browser/api/cast_channel/cast_socket_unittest.cc
@@ -59,7 +59,7 @@ const char kAuthNamespace[] = "urn:x-cast:com.google.cast.tp.deviceauth";
 // Returns an auth challenge message inline.
 CastMessage CreateAuthChallenge() {
   CastMessage output;
-  CreateAuthChallengeMessage(&output);
+  CreateAuthChallengeMessage(&output, AuthContext::Create());
   return output;
 }
 
@@ -206,7 +206,8 @@ class TestCastSocket : public CastSocketImpl {
                        base::TimeDelta::FromMilliseconds(timeout_ms),
                        false,
                        logger,
-                       device_capabilities),
+                       device_capabilities,
+                       AuthContext::Create()),
         capturing_net_log_(capturing_net_log),
         ip_(ip_endpoint),
         extract_cert_result_(true),