[cast_channel] Clean up CastSocketImpl ctor parameters

components/cast_channel/cast_socket.cc

Index: components/cast_channel/cast_socket.cc
diff --git a/components/cast_channel/cast_socket.cc b/components/cast_channel/cast_socket.cc
index 3675874ec571c660cac2d6d4af0c0b6c629b0cb6..10de398babb01b651505fc5b879e2c7da6a6ddf4 100644
--- a/components/cast_channel/cast_socket.cc
+++ b/components/cast_channel/cast_socket.cc
@@ -89,17 +89,13 @@ using ChannelError = ::cast_channel::ChannelError;
 using ChannelAuthType = ::cast_channel::ChannelAuthType;
 using ReadyState = ::cast_channel::ReadyState;
 
-CastSocketImpl::CastSocketImpl(const std::string& owner_extension_id,
-                               const net::IPEndPoint& ip_endpoint,
-                               ChannelAuthType channel_auth,
+CastSocketImpl::CastSocketImpl(const net::IPEndPoint& ip_endpoint,
                                net::NetLog* net_log,
                                const base::TimeDelta& timeout,
                                bool keep_alive,
                                const scoped_refptr<Logger>& logger,
                                uint64_t device_capabilities)
-    : CastSocketImpl(owner_extension_id,
-                     ip_endpoint,
-                     channel_auth,
+    : CastSocketImpl(ip_endpoint,
                      net_log,
                      timeout,
                      keep_alive,
@@ -107,9 +103,7 @@ CastSocketImpl::CastSocketImpl(const std::string& owner_extension_id,
                      device_capabilities,
                      AuthContext::Create()) {}
 
-CastSocketImpl::CastSocketImpl(const std::string& owner_extension_id,
-                               const net::IPEndPoint& ip_endpoint,
-                               ChannelAuthType channel_auth,
+CastSocketImpl::CastSocketImpl(const net::IPEndPoint& ip_endpoint,
                                net::NetLog* net_log,
                                const base::TimeDelta& timeout,
                                bool keep_alive,
@@ -118,7 +112,7 @@ CastSocketImpl::CastSocketImpl(const std::string& owner_extension_id,
                                const AuthContext& auth_context)
     : channel_id_(0),
       ip_endpoint_(ip_endpoint),
-      channel_auth_(channel_auth),
+      channel_auth_(ChannelAuthType::SSL_VERIFIED),

[imcheng, 2017/06/14 22:25:34]

Can we remove this field and just hardcode SSL_VERIFIED wherever channel_auth_ /
(channel_auth()) is used?


It seems like we can remove ChannelAuthType entirely; but we may have to do it
in stages since it's also defined in the Cast Channel API IDL. 

[zhaobin, 2017/06/15 02:22:22]

Done.

       net_log_(net_log),
       keep_alive_(keep_alive),
       logger_(logger),