[mojo-edk] Expose notification source to MojoWatch callbacks

mojo/public/cpp/bindings/interface_ptr.h

Index: mojo/public/cpp/bindings/interface_ptr.h
diff --git a/mojo/public/cpp/bindings/interface_ptr.h b/mojo/public/cpp/bindings/interface_ptr.h
index 9b005eee815eeec57aea39b5563baf3d87bd705c..f0532d7c09a012f4af1e5b681b5d3c4cd65f1ab2 100644
--- a/mojo/public/cpp/bindings/interface_ptr.h
+++ b/mojo/public/cpp/bindings/interface_ptr.h
@@ -173,6 +173,16 @@ class InterfacePtr {
     return internal_state_.associated_group();
   }
 
+  // Allows synchronous dispatch for this endpoint. When sync dispatch is
+  // allowed, a response originating from a binding on the same thread may
+  // synchronously invoke the response callback.
+  //
+  // Note that this also allows synchronous dispatch for any endpoints
+  // which are associated with this one and which live on the same thread.
+  void SetAllowSyncDispatch(bool allowed) {
+    internal_state_.SetAllowSyncDispatch(allowed);
+  }
+
   // DO NOT USE. Exposed only for internal use and for testing.
   internal::InterfacePtrState<Interface, Interface::PassesAssociatedKinds_>*
   internal_state() {