Make it possible to write a message pipe endpoint's peer into it.

mojo/edk/system/mock_simple_dispatcher.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/edk/system/mock_simple_dispatcher.h"
 
 #include "base/logging.h"
 #include "mojo/edk/util/thread_annotations.h"
 
 using mojo::util::MakeRefCounted;
@@ skipping 48 matching lines @@
     MojoHandleSignals satisfied_signals,
     MojoHandleSignals satisfiable_signals)
     : state_(satisfied_signals, satisfiable_signals) {}
 
 MockSimpleDispatcher::MockSimpleDispatcher(const HandleSignalsState& state)
     : state_(state) {}
 
 MockSimpleDispatcher::~MockSimpleDispatcher() {}
 
 RefPtr<Dispatcher>
-MockSimpleDispatcher::CreateEquivalentDispatcherAndCloseImplNoLock()
-    MOJO_NO_THREAD_SAFETY_ANALYSIS {
+MockSimpleDispatcher::CreateEquivalentDispatcherAndCloseImplNoLock(
+    MessagePipe* /*message_pipe*/,
+    unsigned /*port*/) MOJO_NO_THREAD_SAFETY_ANALYSIS {
+  CancelAllAwakablesNoLock();
   return MakeRefCounted<MockSimpleDispatcher>(state_);
 }
 
 HandleSignalsState MockSimpleDispatcher::GetHandleSignalsStateImplNoLock()
     const {
   mutex().AssertHeld();
   return state_;
 }
 
 }  // namespace test
 }  // namespace system
 }  // namespace mojo