Let MediaError.MEDIA_ERR_ENCRYPTED depend on EncryptedMediaAnyVersion

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 0b6d3a09a20b2910a6a570b7a00d4ca42b82bdd4..4cf13edcef5ec962f7a385f215f3a896696f1987 100644
--- a/Source/core/html/MediaError.idl
+++ b/Source/core/html/MediaError.idl
@@ -26,10 +26,10 @@
 [
     RuntimeEnabled=Media
 ] interface MediaError {
-      const unsigned short MEDIA_ERR_ABORTED = 1;
-      const unsigned short MEDIA_ERR_NETWORK = 2;
-      const unsigned short MEDIA_ERR_DECODE = 3;
-      const unsigned short MEDIA_ERR_SRC_NOT_SUPPORTED = 4;
-      const unsigned short MEDIA_ERR_ENCRYPTED = 5;
-      readonly attribute unsigned short code;
+    const unsigned short MEDIA_ERR_ABORTED = 1;
+    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;
+    readonly attribute unsigned short code;
 };