Send pointerleave and pointerenter events for styluses on Mac

content/browser/renderer_host/render_widget_host_view_mac.h

Index: content/browser/renderer_host/render_widget_host_view_mac.h
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.h b/content/browser/renderer_host/render_widget_host_view_mac.h
index 6c1efb1d4c7ebd1e3b7564dc195d850daa9a8752..aafd66ca77082c88647e996b018dcf2a03f521d2 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.h
+++ b/content/browser/renderer_host/render_widget_host_view_mac.h
@@ -170,6 +170,11 @@ struct TextInputState;
   // key down event.
   BOOL suppressNextEscapeKeyUp_;
 
+  // This is used to indicate if a stylus is currently in the proximity of the
+  // tablet.
+  bool isStylusEnteringProximity_;
+  blink::WebPointerProperties::PointerType pointerType_;
+
   // The set of key codes from key down events that we haven't seen the matching
   // key up events yet.
   // Used for filtering out non-matching NSKeyUp events.