Remove special case for HTMLMediaElement in determineDispatchBehavior

Source/core/events/EventPath.cpp

Index: Source/core/events/EventPath.cpp
diff --git a/Source/core/events/EventPath.cpp b/Source/core/events/EventPath.cpp
index 0482f4253fdf6315ffa6e4f32b2c73ea2fb07b50..4a6207d970d20b22b6c2e32993233731bb64985d 100644
--- a/Source/core/events/EventPath.cpp
+++ b/Source/core/events/EventPath.cpp
@@ -39,7 +39,6 @@
 #include "core/events/MouseEvent.h"
 #include "core/events/TouchEvent.h"
 #include "core/events/TouchEventContext.h"
-#include "core/html/HTMLMediaElement.h"
 #include "core/svg/SVGElementInstance.h"
 #include "core/svg/SVGUseElement.h"
 
@@ -82,15 +81,6 @@ static inline bool inTheSameScope(ShadowRoot* shadowRoot, EventTarget* target)
 
 static inline EventDispatchBehavior determineDispatchBehavior(Event* event, ShadowRoot* shadowRoot, EventTarget* target)
 {
-    // Video-only full screen is a mode where we use the shadow DOM as an implementation
-    // detail that should not be detectable by the web content.
-    if (Element* element = FullscreenElementStack::currentFullScreenElementFrom(target->toNode()->document())) {
-        // FIXME: We assume that if the full screen element is a media element that it's
-        // the video-only full screen. Both here and elsewhere. But that is probably wrong.
-        if (isHTMLMediaElement(*element) && shadowRoot && shadowRoot->host() == element)
-            return StayInsideShadowDOM;
-    }
-
     // WebKit never allowed selectstart event to cross the the shadow DOM boundary.
     // Changing this breaks existing sites.
     // See https://bugs.webkit.org/show_bug.cgi?id=52195 for details.