[Extensions] Convert APIs to use movable types [3]

chrome/common/extensions/api/cast_devices_private.idl

Index: chrome/common/extensions/api/cast_devices_private.idl
diff --git a/chrome/common/extensions/api/cast_devices_private.idl b/chrome/common/extensions/api/cast_devices_private.idl
index 2903a58c326b106db07436635a1f5917d156424e..d6e4f85fe332963a2293493241d9f2726825d5d5 100644
--- a/chrome/common/extensions/api/cast_devices_private.idl
+++ b/chrome/common/extensions/api/cast_devices_private.idl
@@ -5,7 +5,7 @@
 // The <code>chrome.cast.devicesPrivate</code> API manages starting and stopping
 // casts based on receiver names. It also provides a list of available
 // receivers.
-namespace cast.devicesPrivate {
+[use_movable_types=true] namespace cast.devicesPrivate {
   // A cast receiver is an actual cast device. It has a unique |id| and a
   // non-unique |name| which is how people identify it.
   dictionary Receiver {