This will disable the behavior on Windows 10 in which

ui/views/win/hwnd_message_handler.h

Index: ui/views/win/hwnd_message_handler.h
diff --git a/ui/views/win/hwnd_message_handler.h b/ui/views/win/hwnd_message_handler.h
index 143b1c61fec46b2a8179f28ce6851b4b3b1f92e7..54cec415a5033756961086b6c1f0158784f03e4c 100644
--- a/ui/views/win/hwnd_message_handler.h
+++ b/ui/views/win/hwnd_message_handler.h
@@ -337,6 +337,9 @@ class VIEWS_EXPORT HWNDMessageHandler :
     CR_MESSAGE_HANDLER_EX(WM_NCMOUSELEAVE, OnMouseRange)
     CR_MESSAGE_HANDLER_EX(WM_SETCURSOR, OnSetCursor);
 
+    // Pointer events.
+    CR_MESSAGE_HANDLER_EX(WM_POINTERACTIVATE, OnPointerActivate)
+
     // Key events.
     CR_MESSAGE_HANDLER_EX(WM_KEYDOWN, OnKeyEvent)
     CR_MESSAGE_HANDLER_EX(WM_KEYUP, OnKeyEvent)
@@ -432,6 +435,7 @@ class VIEWS_EXPORT HWNDMessageHandler :
   void OnKillFocus(HWND focused_window);
   LRESULT OnMouseActivate(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnMouseRange(UINT message, WPARAM w_param, LPARAM l_param);
+  LRESULT OnPointerActivate(UINT message, WPARAM w_param, LPARAM l_param);
   void OnMove(const gfx::Point& point);
   void OnMoving(UINT param, const RECT* new_bounds);
   LRESULT OnNCActivate(UINT message, WPARAM w_param, LPARAM l_param);