Fixed mouseenter/mouseleave event firing order.

Source/core/page/EventHandler.h

Index: Source/core/page/EventHandler.h
diff --git a/Source/core/page/EventHandler.h b/Source/core/page/EventHandler.h
index 5b152056a6da77b25be34f1a435a9a04775d23cd..ddab48132ced774cc34a89280c6777df7aa6f53f 100644
--- a/Source/core/page/EventHandler.h
+++ b/Source/core/page/EventHandler.h
@@ -263,7 +263,10 @@ private:
 
     void invalidateClick();
 
-    void updateMouseEventTargetNode(Node*, const PlatformMouseEvent&, bool fireMouseOverOut);
+    void updateMouseEventTargetNode(Node*, const PlatformMouseEvent&, bool);
+
+    /* Dispatches mouseover, mouseout, mouseenter and mouseleave events to appropriate nodes when the mouse pointer moves from one node to another. */
+    void sendMouseEventsForNodeTransition(Node*, Node*, const PlatformMouseEvent&);
 
     MouseEventWithHitTestResults prepareMouseEvent(const HitTestRequest&, const PlatformMouseEvent&);