Deprecate MediaError.MEDIA_ERR_ENCRYPTED

Source/core/frame/UseCounter.cpp

Index: Source/core/frame/UseCounter.cpp
diff --git a/Source/core/frame/UseCounter.cpp b/Source/core/frame/UseCounter.cpp
index 7efebe7c78e7a507ad388bbaf3a58e345b025cd2..d2ce73cda4f6344ee4afe33616996c6e3dcc7c7d 100644
--- a/Source/core/frame/UseCounter.cpp
+++ b/Source/core/frame/UseCounter.cpp
@@ -703,6 +703,9 @@ String UseCounter::deprecationMessage(Feature feature)
     case DOMImplementationCreateCSSStyleSheet:
         return "'DOMImplementation.createCSSStyleSheet()' is deprecated.";
 
+    case MediaErrorEncrypted:
+        return "'MediaError.MEDIA_ERR_ENCRYPTED' is deprecated. This error code is never used.";
+
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();