Disambiguate LifecycleObserver::contextDestroyed

third_party/WebKit/Source/modules/webmidi/MIDIAccess.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 207 matching lines @@
     // "now".  We need to translate it exactly to 0 seconds.
     timeStamp = 0;
   } else {
     double documentStartTime = loader->timing().referenceMonotonicTime();
     timeStamp = documentStartTime + 0.001 * timeStampInMilliseconds;
   }
 
   m_accessor->sendMIDIData(portIndex, data, length, timeStamp);
 }
 
-void MIDIAccess::contextDestroyed() {
+void MIDIAccess::contextDestroyed(ExecutionContext*) {
   m_accessor.reset();
 }
 
 DEFINE_TRACE(MIDIAccess) {
   visitor->trace(m_inputs);
   visitor->trace(m_outputs);
   EventTargetWithInlineData::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink