Add a flag to update hover effect when a layout is changed

third_party/WebKit/Source/core/input/MouseEventManager.h

Index: third_party/WebKit/Source/core/input/MouseEventManager.h
diff --git a/third_party/WebKit/Source/core/input/MouseEventManager.h b/third_party/WebKit/Source/core/input/MouseEventManager.h
index 0a1f7b406524bfee617a789b74c6b476c1897754..02d61cd3ac64575222f7e7d284d8cc850b350f11 100644
--- a/third_party/WebKit/Source/core/input/MouseEventManager.h
+++ b/third_party/WebKit/Source/core/input/MouseEventManager.h
@@ -43,6 +43,8 @@ class CORE_EXPORT MouseEventManager final
   virtual ~MouseEventManager();
   DECLARE_TRACE();
 
+  enum FakeMouseMoveReason { kDuringScroll, kPerFrame };
+
   WebInputEventResult DispatchMouseEvent(EventTarget*,
                                          const AtomicString&,
                                          const WebMouseEvent&,
@@ -87,7 +89,7 @@ class CORE_EXPORT MouseEventManager final
   void FakeMouseMoveEventTimerFired(TimerBase*);
 
   void CancelFakeMouseMoveEvent();
-  void DispatchFakeMouseMoveEventSoon();
+  void DispatchFakeMouseMoveEventSoon(MouseEventManager::FakeMouseMoveReason);
   void DispatchFakeMouseMoveEventSoonInQuad(const FloatQuad&);
 
   void SetLastKnownMousePosition(const WebMouseEvent&);
@@ -148,6 +150,8 @@ class CORE_EXPORT MouseEventManager final
 
   bool MouseDownMayStartDrag();
 
+  bool FakeMouseMovePending() const;
+
  private:
   class MouseEventBoundaryEventDispatcher : public BoundaryEventDispatcher {
     WTF_MAKE_NONCOPYABLE(MouseEventBoundaryEventDispatcher);