Spec question: Using settings dictionaries instead of MediaConstraints

At the interim, it was indicated that using MediaConstraints for non-media
PeerConnection methods was probably not the right fit, one reason being
that most options were only relevant for a specific method, and it would be
good to make it clear which options should be passed to which methods.

Therefore I propose that we define other settings dictionaries, similar to
MediaConstraints, but named specifically for the methods in which they will
be used.

This results in new dictionaries IceOptions and SessionDescriptionOptions,
with values as shown below:

IceOptions.AllowedCandidates = ("none", "relay", "all) // "all", if not
specified

SessionDescriptionOptions.IncludeAudio = true/false // forces m=audio line
to be included
SessionDescriptionOptions.IncludeVideo = true/false // forces m=video line
to be included
SessionDescriptionOptions.UseVoiceActivityDetection = true/false //
includes CN codecs if true
SessionDescriptionOptions.RestartIce = true/false // generates offer with
new ufrag/pwd
SessionDescriptionOptions.GetCapabilities = true/false // generates
"capabilities" offer

These fit into the existing API on the createOffer/Answer and updateIce
methods:

*

[Constructor (IceServers configuration, optional IceOptions iceOptions)]
interface PeerConnection {
   void       createOffer<http://dev.w3.org/2011/webrtc/editor/webrtc.html#widl-PeerConnection-createOffer-void-SessionDescriptionCallback-successCallback-PeerConnectionErrorCallback-failureCallback-MediaConstraints-constraints>(SessionDescriptionCallback
successCallback,
optional PeerConnectionErrorCallback failureCallback, optional
SessionDescriptionOptions options);
   void       createAnswer<http://dev.w3.org/2011/webrtc/editor/webrtc.html#widl-PeerConnection-createAnswer-void-SessionDescription-offer-SessionDescriptionCallback-successCallback-PeerConnectionErrorCallback-failureCallback-MediaConstraints-constraints-Boolean-createProvisionalAnswer-false>(SessionDescriptionCallback
successCallback, optional
PeerConnectionErrorCallback failureCallback, optional
SessionDescriptionOptions options);
  ...

   void       updateIce<http://dev.w3.org/2011/webrtc/editor/webrtc.html#widl-PeerConnection-updateIce-void-IceServers-configuration-MediaConstraints-constraints-Boolean-restart-false>(optional
IceServers<http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-IceServers>configuration,
optional IceOptions options);




Does this look reasonable?
*