Set the initial resolution of an RDP session to the client screen resolution if it is available.

remoting/protocol/session_config.h

Index: remoting/protocol/session_config.h
diff --git a/remoting/protocol/session_config.h b/remoting/protocol/session_config.h
index bca980034a0d525ede43efc33e7d22618a0d1984..36f320e7a5cf5d3bf9539c069e29cd99289361a6 100644
--- a/remoting/protocol/session_config.h
+++ b/remoting/protocol/session_config.h
@@ -15,6 +15,7 @@ namespace remoting {
 namespace protocol {
 
 extern const int kDefaultStreamVersion;
+extern const int kCapabilitiesControlStreamVersion;
 
 // Struct for configuration parameters of a single channel.
 // Some channels (like video) may have multiple underlying sockets that need
@@ -82,6 +83,11 @@ class SessionConfig {
     return audio_config_.transport != ChannelConfig::TRANSPORT_NONE;
   }
 
+  // Returns true if the control channel supports capabilities.
+  bool supports_capabilities() const {
+    return control_config_.version >= kCapabilitiesControlStreamVersion;
+  }
+
   // Returns a suitable session configuration for use in tests.
   static SessionConfig ForTest();