Move Web-facing fullscreen APIs to DocumentFullscreen and ElementFullscreen

Source/core/dom/DocumentFullscreen.h

Index: Source/core/dom/DocumentFullscreen.h
diff --git a/Source/core/dom/DocumentFullscreen.h b/Source/core/dom/DocumentFullscreen.h
index f4bd351449e38a15d940358b3f99f32ea1156c77..2096c2f379950236e720f7eb13803894b6a5c3a3 100644
--- a/Source/core/dom/DocumentFullscreen.h
+++ b/Source/core/dom/DocumentFullscreen.h
@@ -26,6 +26,8 @@
 #ifndef DocumentFullscreen_h
 #define DocumentFullscreen_h
 
+#include "core/events/EventTarget.h"
+
 namespace blink {
 
 class Document;
@@ -40,6 +42,9 @@ public:
     static bool webkitFullscreenEnabled(Document&);
     static Element* webkitFullscreenElement(Document&);
     static void webkitExitFullscreen(Document&);
+
+    DEFINE_STATIC_ATTRIBUTE_EVENT_LISTENER(webkitfullscreenchange);
+    DEFINE_STATIC_ATTRIBUTE_EVENT_LISTENER(webkitfullscreenerror);
 };
 
 } // namespace blink