Remove EME and MSE from RuntimeEnabledFeatures.

third_party/WebKit/Source/modules/encryptedmedia/MediaKeySystemConfiguration.idl

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // https://w3c.github.io/encrypted-media/#idl-def-MediaKeySystemConfiguration
 
 enum MediaKeysRequirement {
     "required",
     "optional",
     "not-allowed"
 };
 
-[
-    RuntimeEnabled=EncryptedMedia
-] dictionary MediaKeySystemConfiguration {
+dictionary MediaKeySystemConfiguration {
     sequence<DOMString> initDataTypes;
     sequence<MediaKeySystemMediaCapability> audioCapabilities;
     sequence<MediaKeySystemMediaCapability> videoCapabilities;
     MediaKeysRequirement distinctiveIdentifier = "optional";
     MediaKeysRequirement persistentState = "optional";
     sequence<DOMString> sessionTypes;
     DOMString label;
 };