Replace tests of ASSERT_ENABLED with ENABLE(ASSERT).

Source/modules/encryptedmedia/MediaKeys.cpp

 /*
  * Copyright (C) 2013 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 27 matching lines @@
 #include "platform/ContentType.h"
 #include "platform/Logging.h"
 #include "platform/MIMETypeRegistry.h"
 #include "platform/Timer.h"
 #include "platform/UUID.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebContentDecryptionModule.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Uint8Array.h"
 
-#if ASSERT_ENABLED
+#if ENABLE(ASSERT)
 namespace {
 
 // The list of possible values for |sessionType| passed to createSession().
 const char* kTemporary = "temporary";
 const char* kPersistent = "persistent";
 
 } // namespace
 #endif
 
 namespace WebCore {
@@ skipping 215 matching lines @@
 
 void MediaKeys::contextDestroyed()
 {
     ContextLifecycleObserver::contextDestroyed();
 
     // We don't need the CDM anymore.
     m_cdm.clear();
 }
 
 }