Remove prefixed EME.

third_party/WebKit/public/web/WebRuntimeFeatures.h

 /*
  * 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 55 matching lines @@
 
     BLINK_EXPORT static void enableDecodeToYUV(bool);
 
     BLINK_EXPORT static void enableDisplayList2dCanvas(bool);
     BLINK_EXPORT static void forceDisplayList2dCanvas(bool);
     BLINK_EXPORT static void forceDisable2dCanvasCopyOnWrite(bool);
 
     BLINK_EXPORT static void enableEncryptedMedia(bool);
     BLINK_EXPORT static bool isEncryptedMediaEnabled();
 
-    BLINK_EXPORT static void enablePrefixedEncryptedMedia(bool);
-    BLINK_EXPORT static bool isPrefixedEncryptedMediaEnabled();
-
     BLINK_EXPORT static void enableCompositorAnimationTimelines(bool);
 
     BLINK_EXPORT static void enableExperimentalCanvasFeatures(bool);
 
     BLINK_EXPORT static void enableExperimentalFramework(bool);
     BLINK_EXPORT static bool isExperimentalFrameworkEnabled();
 
     BLINK_EXPORT static void enableFastMobileScrolling(bool);
 
     BLINK_EXPORT static void enableFileSystem(bool);
@@ skipping 84 matching lines @@
     // (crbug.com/543198).
     BLINK_EXPORT static bool isServiceWorkerExtendableMessageEventEnabled();
 
 private:
     WebRuntimeFeatures();
 };
 
 } // namespace blink
 
 #endif