Start sending auxclick instead of click for non-primary buttons

third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 437 matching lines @@
 }
 
 bool isEnterKeyKeydownEvent(Event* event)
 {
     return event->type() == EventTypeNames::keydown && event->isKeyboardEvent() && toKeyboardEvent(event)->key() == "Enter" && !toKeyboardEvent(event)->repeat();
 }
 
 bool isLinkClick(Event* event)
 {
     // Allow detail <= 1 so that synthetic clicks work. They may have detail == 0.
-    return event->type() == EventTypeNames::click && (!event->isMouseEvent() || (toMouseEvent(event)->button() != RightButton && toMouseEvent(event)->detail() <= 1));
+    return (event->type() == EventTypeNames::click || event->type() == EventTypeNames::auxclick) && (!event->isMouseEvent() || (toMouseEvent(event)->button() != RightButton && toMouseEvent(event)->detail() <= 1));
 }
 
 bool HTMLAnchorElement::willRespondToMouseClickEvents()
 {
     return isLink() || HTMLElement::willRespondToMouseClickEvents();
 }
 
 bool HTMLAnchorElement::isInteractiveContent() const
 {
     return isLink();
 }
 
 Node::InsertionNotificationRequest HTMLAnchorElement::insertedInto(ContainerNode* insertionPoint)
 {
     InsertionNotificationRequest request = HTMLElement::insertedInto(insertionPoint);
     logAddElementIfIsolatedWorldAndInDocument("a", hrefAttr);
     return request;
 }
 
 HTMLAnchorElement::NavigationHintSender* HTMLAnchorElement::ensureNavigationHintSender()
 {
     if (!m_navigationHintSender)
         m_navigationHintSender = NavigationHintSender::create(this);
     return m_navigationHintSender;
 }
 
 } // namespace blink