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 9a2f0da14f1af1bb5717dbf56d17313d42168ccd..d131ca0e991494348267169ce568b1822bc32047 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.h
+++ b/content/browser/renderer_host/render_widget_host_view_mac.h
@@ -175,6 +175,11 @@ class Layer;
   // 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.