Make sure PointerEvents's isPrimary set correctly for stylus

third_party/WebKit/Source/core/input/PointerEventManager.cpp

Index: third_party/WebKit/Source/core/input/PointerEventManager.cpp
diff --git a/third_party/WebKit/Source/core/input/PointerEventManager.cpp b/third_party/WebKit/Source/core/input/PointerEventManager.cpp
index b4bf7541f4b9c6c8c3f1a60af86f90840e96f2cf..e543a98baab3f1352d9e22116b018c7594052548 100644
--- a/third_party/WebKit/Source/core/input/PointerEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/PointerEventManager.cpp
@@ -523,6 +523,10 @@ WebInputEventResult PointerEventManager::SendMousePointerEvent(
     }
   }
 
+  if (mouse_event.GetType() == WebInputEvent::kMouseLeave &&
+      pointer_event->pointerType() == "pen") {

[dtapuska, 2017/04/27 16:57:39]

I think this could probably be:
mouse_event.pointer_type == kPen

which would avoid the string compare.

[lanwei, 2017/04/27 20:18:20]

Done.

+    pointer_event_factory_.Remove(pointer_event->pointerId());
+  }
   return result;
 }