Remove ENABLE_ENCRYPTED_MEDIA #define as it's always enabled

Source/core/platform/graphics/MediaPlayerPrivate.h

Index: Source/core/platform/graphics/MediaPlayerPrivate.h
diff --git a/Source/core/platform/graphics/MediaPlayerPrivate.h b/Source/core/platform/graphics/MediaPlayerPrivate.h
index 8e8d6d347e1c27fb2179b9ffdba3074f93609872..91e5168123c4277465c3518719bb38e00f91f3ea 100644
--- a/Source/core/platform/graphics/MediaPlayerPrivate.h
+++ b/Source/core/platform/graphics/MediaPlayerPrivate.h
@@ -150,11 +150,9 @@ public:
     virtual AudioSourceProvider* audioSourceProvider() { return 0; }
 #endif
 
-#if ENABLE(ENCRYPTED_MEDIA)
     virtual MediaPlayer::MediaKeyException addKey(const String&, const unsigned char*, unsigned, const unsigned char*, unsigned, const String&) { return MediaPlayer::KeySystemNotSupported; }
     virtual MediaPlayer::MediaKeyException generateKeyRequest(const String&, const unsigned char*, unsigned) { return MediaPlayer::KeySystemNotSupported; }
     virtual MediaPlayer::MediaKeyException cancelKeyRequest(const String&, const String&) { return MediaPlayer::KeySystemNotSupported; }
-#endif
 
     virtual bool requiresTextTrackRepresentation() const { return false; }
     virtual void setTextTrackRepresentation(TextTrackRepresentation*) { }