Remove old Authentication code that we don't use or need.

remoting/proto/control.proto

Index: remoting/proto/control.proto
diff --git a/remoting/proto/control.proto b/remoting/proto/control.proto
index 1f75bcb0500729fa1d45ed3305ec07efa0dc7dea..1d102edfaad196915e5c98be7d1ca04032a00d86 100644
--- a/remoting/proto/control.proto
+++ b/remoting/proto/control.proto
@@ -10,4 +10,16 @@ option optimize_for = LITE_RUNTIME;
 
 package remoting.protocol;
 
-// Add control messages here. Currently we don't have any.
+// BeginSessionDepricated is send from host to client when session

[Wez, 2011/11/03 18:14:37]

typo: Depricated -> Deprecated
typo: send -> sent
typo: ...when _the_ session...

[Sergey Ulanov, 2011/11/03 19:11:55]

Done.

+// starts. Legacy clients expect to receive this message in the

[Wez, 2011/11/03 18:14:37]

typo: in -> at

[Sergey Ulanov, 2011/11/03 19:11:55]

Done.

+// beginning of each session so the host sends this message. Current

[Wez, 2011/11/03 18:14:37]

nit: lose "so the host..."?

[Sergey Ulanov, 2011/11/03 19:11:55]

Done.

+// client ignores it.

[Wez, 2011/11/03 18:14:37]

typo: client -> clients, ignores -> ignore

[Sergey Ulanov, 2011/11/03 19:11:55]

Done.

+//
+// TODO(sergeyu): Remove it once all clients are upgraded to the new
+// version (Chrome 17 is released).

[Wez, 2011/11/03 18:14:37]

Release of M17 doesn't guarantee that all clients are upgraded, though, so I
don't think we can necessarily do that.

[Wez, 2011/11/03 20:39:39]

I think we may have to wait to remove this until we move to NaCl, i.e. until we
control the plugin version in the web-app rather than the browser.

+message LocalLoginStatusDeprecated {
+  optional bool success = 1;
+}
+message BeginSessionDeprecated {
+  optional LocalLoginStatusDeprecated login_status = 1;
+}