[cast_channel] Clean up CastSocketImpl ctor parameters

extensions/browser/api/cast_channel/cast_channel_apitest.cc

Index: extensions/browser/api/cast_channel/cast_channel_apitest.cc
diff --git a/extensions/browser/api/cast_channel/cast_channel_apitest.cc b/extensions/browser/api/cast_channel/cast_channel_apitest.cc
index 296a2a92aeb067b454d8d8ba76412f9b06e6075c..b154790299de420f2777c75da51b238465217d88 100644
--- a/extensions/browser/api/cast_channel/cast_channel_apitest.cc
+++ b/extensions/browser/api/cast_channel/cast_channel_apitest.cc
@@ -33,7 +33,6 @@
 using ::cast_channel::CastMessage;
 using ::cast_channel::CastSocket;
 using ::cast_channel::CastTransport;
-using ::cast_channel::ChannelAuthType;
 using ::cast_channel::ChannelError;
 using ::cast_channel::CreateIPEndPointForTest;
 using ::cast_channel::LastError;
@@ -104,8 +103,6 @@ class CastChannelAPITest : public ExtensionApiTest {
         .WillByDefault(ReturnPointee(&channel_id_));
     ON_CALL(*mock_cast_socket_, ip_endpoint())
         .WillByDefault(ReturnRef(ip_endpoint_));
-    ON_CALL(*mock_cast_socket_, channel_auth())
-        .WillByDefault(Return(ChannelAuthType::SSL_VERIFIED));
     ON_CALL(*mock_cast_socket_, keep_alive()).WillByDefault(Return(false));
   }