Add VideoReader and VideoWriter interfaces.

remoting/client/host_connection.h

Index: remoting/client/host_connection.h
diff --git a/remoting/client/host_connection.h b/remoting/client/host_connection.h
index 71210257cfc6d01236de2ac1c2a5d4b93f1214eb..3d27ceb1b78b9be0092ff51116324ab5bc3de391 100644
--- a/remoting/client/host_connection.h
+++ b/remoting/client/host_connection.h
@@ -12,6 +12,8 @@
 
 namespace remoting {
 
+class VideoStub;
+
 struct ClientConfig;
 
 class HostConnection {
@@ -39,7 +41,8 @@ class HostConnection {
 
   // TODO(ajwong): We need to generalize this API.
   virtual void Connect(const ClientConfig& config,
-                       HostEventCallback* event_callback) = 0;
+                       HostEventCallback* event_callback,
+                       VideoStub* video_stub) = 0;
   virtual void Disconnect() = 0;
 
   // Send an input event to the host.