Expose MediaQueryList interface and make arguments non-optional

Source/core/css/MediaQueryList.cpp

Index: Source/core/css/MediaQueryList.cpp
diff --git a/Source/core/css/MediaQueryList.cpp b/Source/core/css/MediaQueryList.cpp
index e2b3d0a0a7939d7522f8350de411d562554f64fa..008c13667ac0beb8417ac442d2bf6396029b548f 100644
--- a/Source/core/css/MediaQueryList.cpp
+++ b/Source/core/css/MediaQueryList.cpp
@@ -60,11 +60,17 @@ String MediaQueryList::media() const
 
 void MediaQueryList::addDeprecatedListener(PassRefPtr<EventListener> listener)
 {
+    if (!listener)
+        return;
+
     addEventListener(EventTypeNames::change, listener, false);
 }
 
 void MediaQueryList::removeDeprecatedListener(PassRefPtr<EventListener> listener)
 {
+    if (!listener)
+        return;
+
     removeEventListener(EventTypeNames::change, listener, false);
 }