The rest of the Presentation API IDL as stubs.

LayoutTests/presentation/presentation-api.html

Index: LayoutTests/presentation/presentation-api.html
diff --git a/LayoutTests/presentation/presentation-api.html b/LayoutTests/presentation/presentation-api.html
index 4ab8efae3c3292a8268e2f0acc19a9b98135080f..e32a8acefa29cd538c8014858aee8fac9cce1426 100644
--- a/LayoutTests/presentation/presentation-api.html
+++ b/LayoutTests/presentation/presentation-api.html
@@ -7,11 +7,17 @@
 
 test(function() {
     assert_true('presentation' in navigator);
+    assert_true('session' in navigator.presentation);
+    assert_true('startSession' in navigator.presentation);
+    assert_true('joinSession' in navigator.presentation);
     assert_true('onavailablechange' in navigator.presentation);
 }, "Test that the Presentation API is present.")
 
 test(function() {
   assert_equals(typeof(navigator.presentation), "object");
+  assert_equals(typeof(navigator.presentation.session), "object");
+  assert_equals(typeof(navigator.presentation.startSession), "function");
+  assert_equals(typeof(navigator.presentation.joinSession), "function");
   assert_equals(typeof(navigator.presentation.onavailablechange), "object");
 }, "Test the Presentation API property types.");