Deprecate MediaError.MEDIA_ERR_ENCRYPTED

Source/core/html/MediaError.idl

Index: Source/core/html/MediaError.idl
diff --git a/Source/core/html/MediaError.idl b/Source/core/html/MediaError.idl
index 4cf13edcef5ec962f7a385f215f3a896696f1987..58b94d8af27cacdce93d3b4d2943752a175f505e 100644
--- a/Source/core/html/MediaError.idl
+++ b/Source/core/html/MediaError.idl
@@ -30,6 +30,6 @@
     const unsigned short MEDIA_ERR_NETWORK = 2;
     const unsigned short MEDIA_ERR_DECODE = 3;
     const unsigned short MEDIA_ERR_SRC_NOT_SUPPORTED = 4;
-    [RuntimeEnabled=EncryptedMediaAnyVersion] const unsigned short MEDIA_ERR_ENCRYPTED = 5;
+    [RuntimeEnabled=EncryptedMediaAnyVersion, DeprecateAs=MediaErrorEncrypted] const unsigned short MEDIA_ERR_ENCRYPTED = 5;
     readonly attribute unsigned short code;
 };