[Extensions] Remove the "use_movable_types" entry from idl/json files

chrome/common/extensions/api/webrtc_desktop_capture_private.idl

Index: chrome/common/extensions/api/webrtc_desktop_capture_private.idl
diff --git a/chrome/common/extensions/api/webrtc_desktop_capture_private.idl b/chrome/common/extensions/api/webrtc_desktop_capture_private.idl
index 3861551d68ea616fd2a98ec794ec661c8e15114b..d71f518b164782831054d21473360a2075403a04 100644
--- a/chrome/common/extensions/api/webrtc_desktop_capture_private.idl
+++ b/chrome/common/extensions/api/webrtc_desktop_capture_private.idl
@@ -4,7 +4,7 @@
 
 // Use the <code>chrome.webrtcDesktopCapturePrivate</code> API to capture
 // desktop media requested from a WebView.
-[use_movable_types=true] namespace webrtcDesktopCapturePrivate {
+namespace webrtcDesktopCapturePrivate {
   dictionary RequestInfo {
     // The guest process id for the requester.
     long guestProcessId;