Improve detection of touch events when hiding media controls.

Source/core/events/MouseEvent.h

Index: Source/core/events/MouseEvent.h
diff --git a/Source/core/events/MouseEvent.h b/Source/core/events/MouseEvent.h
index 3bb4298f81c9ae39854e77c07e001963e78b23cf..d9bbc351530f09c7e644cda32fe2750b97e50cdc 100644
--- a/Source/core/events/MouseEvent.h
+++ b/Source/core/events/MouseEvent.h
@@ -59,7 +59,8 @@ public:
         int detail, int screenX, int screenY, int pageX, int pageY,
         int movementX, int movementY,
         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button,
-        PassRefPtrWillBeRawPtr<EventTarget> relatedTarget, PassRefPtrWillBeRawPtr<DataTransfer>, bool isSimulated = false);
+        PassRefPtrWillBeRawPtr<EventTarget> relatedTarget, PassRefPtrWillBeRawPtr<DataTransfer>,
+        bool isSimulated = false, PlatformMouseEvent::SyntheticEventType = PlatformMouseEvent::NotSyntheticOrIndistinguishable);
 
     static PassRefPtrWillBeRawPtr<MouseEvent> create(const AtomicString& eventType, PassRefPtrWillBeRawPtr<AbstractView>, const PlatformMouseEvent&, int detail, PassRefPtrWillBeRawPtr<Node> relatedTarget);
 
@@ -97,7 +98,8 @@ protected:
         int detail, int screenX, int screenY, int pageX, int pageY,
         int movementX, int movementY,
         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button,
-        PassRefPtrWillBeRawPtr<EventTarget> relatedTarget, PassRefPtrWillBeRawPtr<DataTransfer>, bool isSimulated);
+        PassRefPtrWillBeRawPtr<EventTarget> relatedTarget, PassRefPtrWillBeRawPtr<DataTransfer>,
+        bool isSimulated, PlatformMouseEvent::SyntheticEventType);
 
     MouseEvent(const AtomicString& type, const MouseEventInit&);