Oilpan: remove unnecessary ENABLE(OILPAN) protections of trace() calls.

Source/modules/speech/SpeechRecognition.cpp

 /*
  * Copyright (C) 2012 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 copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 187 matching lines @@
 void SpeechRecognition::contextDestroyed()
 {
     m_controller = nullptr;
     PageLifecycleObserver::contextDestroyed();
 }
 
 DEFINE_TRACE(SpeechRecognition)
 {
     visitor->trace(m_grammars);
     visitor->trace(m_audioTrack);
-#if ENABLE(OILPAN)
     visitor->trace(m_controller);
-#endif
     visitor->trace(m_finalResults);
     RefCountedGarbageCollectedEventTargetWithInlineData<SpeechRecognition>::trace(visitor);
     PageLifecycleObserver::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink