Make sure PointerEvents's isPrimary set correctly for stylus

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/input/PointerEventManager.h"
 
 #include "core/dom/DocumentUserGestureToken.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/shadow/FlatTreeTraversal.h"
 #include "core/events/MouseEvent.h"
@@ skipping 505 matching lines @@
     ReleasePointerCapture(pointer_event->pointerId());
     // Send got/lostpointercapture rightaway if necessary.
     ProcessPendingPointerCapture(pointer_event);
 
     if (pointer_event->isPrimary()) {
       prevent_mouse_event_for_pointer_type_[ToPointerTypeIndex(
           mouse_event.pointer_type)] = false;
     }
   }
 
+  if (mouse_event.GetType() == WebInputEvent::kMouseLeave &&
+      mouse_event.pointer_type == WebPointerProperties::PointerType::kPen) {
+    pointer_event_factory_.Remove(pointer_event->pointerId());
+  }
   return result;
 }
 
 bool PointerEventManager::GetPointerCaptureState(
     int pointer_id,
     EventTarget** pointer_capture_target,
     EventTarget** pending_pointer_capture_target) {
   PointerCapturingMap::const_iterator it;
 
   it = pointer_capture_target_.find(pointer_id);
@@ skipping 180 matching lines @@
     if (first_id > unique_touch_event_id)
       return false;
     touch_ids_for_canceled_pointerdowns_.TakeFirst();
     if (first_id == unique_touch_event_id)
       return true;
   }
   return false;
 }
 
 }  // namespace blink