Mojo Example that demos the difference between providing and requesting an interface

mojo/public/cpp/utility/lib/run_loop.cc

Index: mojo/public/cpp/utility/lib/run_loop.cc
diff --git a/mojo/public/cpp/utility/lib/run_loop.cc b/mojo/public/cpp/utility/lib/run_loop.cc
index 5e01a6344ac753d298f952a8b65b2744e6ad3f52..9707e7ecf76600bfd3b99637f654e1a9b2625c7a 100644
--- a/mojo/public/cpp/utility/lib/run_loop.cc
+++ b/mojo/public/cpp/utility/lib/run_loop.cc
@@ -219,7 +219,7 @@ bool RunLoop::RemoveFirstInvalidHandle(const WaitState& wait_state) {
       handler->OnHandleError(wait_state.handles[i], result);
       return true;
     }
-    assert(MOJO_RESULT_DEADLINE_EXCEEDED == result);
+    assert(MOJO_RESULT_DEADLINE_EXCEEDED == result || MOJO_RESULT_OK == result);
   }
   return false;
 }