Update hover state after entering and leaving fullscreen.

Source/core/dom/Fullscreen.cpp

Index: Source/core/dom/Fullscreen.cpp
diff --git a/Source/core/dom/Fullscreen.cpp b/Source/core/dom/Fullscreen.cpp
index 14dbbd8614dd40befb4c00aefa5aea233ee679a1..64b67a512ecf0eaffa02f3a1ab79bd769c43df31 100644
--- a/Source/core/dom/Fullscreen.cpp
+++ b/Source/core/dom/Fullscreen.cpp
@@ -39,6 +39,7 @@
 #include "core/html/HTMLMediaElement.h"
 #include "core/page/Chrome.h"
 #include "core/page/ChromeClient.h"
+#include "core/page/EventHandler.h"
 #include "core/rendering/RenderFullScreen.h"
 #include "platform/UserGestureIndicator.h"
 
@@ -442,6 +443,9 @@ void Fullscreen::didEnterFullScreenForElement(Element* element)
 
     m_fullScreenElement->didBecomeFullscreenElement();
 
+    if (document()->frame())
+        document()->frame()->eventHandler().scheduleHoverStateUpdate();
+
     m_eventQueueTimer.startOneShot(0, FROM_HERE);
 }
 
@@ -465,6 +469,9 @@ void Fullscreen::didExitFullScreenForElement(Element*)
     m_fullScreenElement = nullptr;
     document()->setNeedsStyleRecalc(SubtreeStyleChange);
 
+    if (document()->frame())
+        document()->frame()->eventHandler().scheduleHoverStateUpdate();
+
     // When fullyExitFullscreen is called, we call exitFullscreen on the topDocument(). That means
     // that the events will be queued there. So if we have no events here, start the timer on the
     // exiting document.