Bug 1588087 [wpt PR 19639] - Update interfaces/cssom-view.idl, a=testonly

Automatic update from web-platform-tests
Update interfaces/cssom-view.idl (#19639)

Source: https://github.com/tidoust/reffy-reports/blob/d2f8166/ed/idl/cssom-view.idl
Build: https://travis-ci.org/tidoust/reffy-reports/builds/596582053
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wpt-commits: e7ac156d07b3c7866dec20096ea06cb66b733d12
wpt-pr: 19639

testing/web-platform/tests/interfaces/cssom-view.idl

@@ -53,8 +53,8 @@ partial interface Window {
 interface MediaQueryList : EventTarget {
   readonly attribute CSSOMString media;
   readonly attribute boolean matches;
-  void addListener(EventListener? listener);
+  void addListener(EventListener? callback);
-  void removeListener(EventListener? listener);
+  void removeListener(EventListener? callback);
            attribute EventHandler onchange;
 };