Rework MediaQueryMatcher to batch up listener notification

Source/core/css/MediaQueryListListener.h

Index: Source/core/css/MediaQueryListListener.h
diff --git a/Source/core/css/MediaQueryListListener.h b/Source/core/css/MediaQueryListListener.h
index cf0b743f99dc25fdd46476c644fd3125bc42cb7c..61d9e797ec5caa3c6dea39b353b4a6e0b0092798 100644
--- a/Source/core/css/MediaQueryListListener.h
+++ b/Source/core/css/MediaQueryListListener.h
@@ -39,7 +39,13 @@ public:
             return nullptr;
         return adoptRefWillBeNoop(new MediaQueryListListener(value));
     }
-    void queryChanged(ScriptState*, MediaQueryList*);
+
+    void call(ScriptState*);
+
+    // Used to keep the MediaQueryList alive and registered with the MediaQueryMatcher
+    // as long as the listener exists.
+    void setMediaQueryList(MediaQueryList* query) { m_query = query; }
+    void clearMediaQueryList() { m_query = nullptr; }
 
     bool operator==(const MediaQueryListListener& other) const { return m_value == other.m_value; }
 
@@ -49,6 +55,7 @@ private:
     explicit MediaQueryListListener(const ScriptValue& value) : m_value(value) { }
 
     ScriptValue m_value;
+    RefPtrWillBeMember<MediaQueryList> m_query;
 };
 
 }