include: Add Windows.Foundation.Collections.IObservableMap<K, V> definition.

include/windows.foundation.collections.idl

@@ -23,7 +23,7 @@
 import "inspectable.idl";
 import "asyncinfo.idl";
 import "windowscontracts.idl";
-/* import "eventtoken.idl"; */
+import "eventtoken.idl";
 import "ivectorchangedeventargs.idl";
 
 namespace Windows {
@@ -167,6 +167,18 @@ cpp_quote("#endif")
 
             [
                 contract(Windows.Foundation.FoundationContract, 1.0),
+                uuid(65df2bf5-bf39-41b5-aebc-5a9d865e472b)
+            ]
+            interface IObservableMap<K, V> : IInspectable
+                requires Windows.Foundation.Collections.IMap<K, V>
+            {
+                [eventadd] HRESULT MapChanged([in] Windows.Foundation.Collections.MapChangedEventHandler<K, V> *handler,
+                                              [out, retval] EventRegistrationToken *token);
+                [eventremove] HRESULT MapChanged([in] EventRegistrationToken token);
+            }
+
+            [
+                contract(Windows.Foundation.FoundationContract, 1.0),
                 uuid(bbe1fa4c-b0e3-4583-baef-1f1b2e483e56)
             ]
             interface IVectorView<T> : IInspectable