The rest of the Presentation API IDL as stubs.

Source/modules/presentation/Presentation.idl

Index: Source/modules/presentation/Presentation.idl
diff --git a/Source/modules/presentation/Presentation.idl b/Source/modules/presentation/Presentation.idl
index 1546a1dbd34d8fcd9b995e269d37a37cae91205f..8967457585c037c6732bd7daca24785e92f5ce80 100644
--- a/Source/modules/presentation/Presentation.idl
+++ b/Source/modules/presentation/Presentation.idl
@@ -2,11 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// http://webscreens.github.io/presentation-api/#presentation-interface
+// http://webscreens.github.io/presentation-api/#navigatorpresentation
 
 [
     GarbageCollected,
     RuntimeEnabled=Presentation
 ] interface Presentation : EventTarget {
+    readonly attribute PresentationSession? session;
+
+    [CallWith=ScriptState] Promise startSession(DOMString senderId, [Default=Undefined] optional DOMString presentationId);

[mark a. foltz, 2014/10/29 23:13:14]

Does Blink IDL support Promise<T>?  If so can this be written:

Promise<PresentationSession>

FYI:
http://www.w3.org/2001/tag/doc/promises-guide#webidl-promise-return-values

[whywhat, 2014/10/30 00:51:01]

Good point. Done. Only found one occurrence in the Blink codebase though
(WebBluetooth).

+    [CallWith=ScriptState] Promise joinSession(DOMString senderId, [Default=Undefined] optional DOMString presentationId);

[mark a. foltz, 2014/10/29 23:13:14]

Same comment here.

[whywhat, 2014/10/30 00:51:01]

Done.

+
     attribute EventHandler onavailablechange;
 };