Add VideoPacket struct for video packets. Refactor Decode interface to use it.

remoting/protocol/connection_to_host.h

Index: remoting/protocol/connection_to_host.h
diff --git a/remoting/protocol/connection_to_host.h b/remoting/protocol/connection_to_host.h
index 39aeecd03c5c4e98b771a1076f6ae1293d89faab..e2b0ce2647f281066340edbd136fb75b5160ffa4 100644
--- a/remoting/protocol/connection_to_host.h
+++ b/remoting/protocol/connection_to_host.h
@@ -15,6 +15,7 @@
 namespace remoting {
 namespace protocol {
 
+class SessionConfig;
 class VideoStub;
 
 class ConnectionToHost {
@@ -23,11 +24,6 @@ class ConnectionToHost {
    public:
     virtual ~HostEventCallback() {}
 
-    // Handles an event received by the protocol::ConnectionToHost. Ownership
-    // of the message is passed to the callee.
-    virtual void HandleMessage(ConnectionToHost* conn,
-                               ChromotingHostMessage* message) = 0;
-
     // Called when the network connection is opened.
     virtual void OnConnectionOpened(ConnectionToHost* conn) = 0;
 
@@ -48,6 +44,8 @@ class ConnectionToHost {
                        VideoStub* video_stub) = 0;
   virtual void Disconnect() = 0;
 
+  virtual const SessionConfig* config() = 0;
+
   // Send an input event to the host.
   virtual void SendEvent(const ChromotingClientMessage& msg) = 0;