Non passive touch end or touch cancel listeners should not block scroll.

third_party/WebKit/Source/web/WebPagePopupImpl.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 145 matching lines @@
     {
         return IntSize(0, 0);
     }
 
     void setCursor(const Cursor& cursor, LocalFrame* localRoot) override
     {
         if (m_popup->m_webView->client())
             m_popup->m_webView->client()->didChangeCursor(WebCursorInfo(cursor));
     }
 
+    void setHaveTouchEventListeners(bool hasListeners) override
+    {
+        m_popup->widgetClient()->hasTouchEventHandlers(hasListeners);
+    }
+
     void setEventListenerProperties(WebEventListenerClass eventClass, WebEventListenerProperties properties) override
     {
-        if (eventClass == WebEventListenerClass::Touch)
-            m_popup->widgetClient()->hasTouchEventHandlers(properties != WebEventListenerProperties::Nothing);
         if (m_popup->m_layerTreeView)
             m_popup->m_layerTreeView->setEventListenerProperties(eventClass, properties);
     }
     WebEventListenerProperties eventListenerProperties(WebEventListenerClass eventClass) const override
     {
         if (m_popup->m_layerTreeView)
             return m_popup->m_layerTreeView->eventListenerProperties(eventClass);
         return WebEventListenerProperties::Nothing;
     }
 
@@ skipping 380 matching lines @@
     // A WebPagePopupImpl instance usually has two references.
     //  - One owned by the instance itself. It represents the visible widget.
     //  - One owned by a WebViewImpl. It's released when the WebViewImpl ask the
     //    WebPagePopupImpl to close.
     // We need them because the closing operation is asynchronous and the widget
     // can be closed while the WebViewImpl is unaware of it.
     return adoptRef(new WebPagePopupImpl(client)).leakRef();
 }
 
 } // namespace blink