Oilpan: Enable Oilpan by default in modules/encryptedmedia

Source/modules/encryptedmedia/MediaKeys.idl

 /*
  * Copyright (C) 2013 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 [
     RuntimeEnabled=EncryptedMedia,
     Constructor(DOMString keySystem),
     ConstructorCallWith=ExecutionContext,
     RaisesException=Constructor,
-    WillBeGarbageCollected,
+    GarbageCollected,
     TypeChecking=Interface|Nullable
 ] interface MediaKeys {
     readonly attribute DOMString keySystem;
 
     [CallWith=ExecutionContext, RaisesException] MediaKeySession createSession(DOMString type, Uint8Array initData);
 
     static boolean isTypeSupported(DOMString keySystem, [Default=NullString] optional DOMString contentType);
 };