Fixed & refactored mouse event firing at gesture context menu

third_party/WebKit/Source/core/events/MouseEvent.cpp

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 22 matching lines @@
 
 MouseEvent* MouseEvent::create(ScriptState* scriptState, const AtomicString& type, const MouseEventInit& initializer)
 {
     if (scriptState && scriptState->world().isIsolatedWorld())
         UIEventWithKeyState::didCreateEventInIsolatedWorld(initializer.ctrlKey(), initializer.altKey(), initializer.shiftKey(), initializer.metaKey());
     return new MouseEvent(type, initializer);
 }
 
 MouseEvent* MouseEvent::create(const AtomicString& eventType, AbstractView* view, const PlatformMouseEvent& event, int detail, Node* relatedTarget)
 {
-    DCHECK(event.type() == PlatformEvent::MouseMoved || event.pointerProperties().button != WebPointerProperties::Button::NoButton);
-
     bool isMouseEnterOrLeave = eventType == EventTypeNames::mouseenter || eventType == EventTypeNames::mouseleave;
     bool isCancelable = !isMouseEnterOrLeave;
     bool isBubbling = !isMouseEnterOrLeave;
 
     return MouseEvent::create(
         eventType, isBubbling, isCancelable, view,
         detail, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(),
         event.movementDelta().x(), event.movementDelta().y(),
         event.getModifiers(), static_cast<short>(event.pointerProperties().button),
         platformModifiersToButtons(event.getModifiers()),
@@ skipping 235 matching lines @@
     doubleClickEvent->setTrusted(mouseEvent.isTrusted());
     if (mouseEvent.defaultHandled())
         doubleClickEvent->setDefaultHandled();
     DispatchEventResult doubleClickDispatchResult = EventDispatcher::dispatchEvent(dispatcher.node(), MouseEventDispatchMediator::create(doubleClickEvent));
     if (doubleClickDispatchResult != DispatchEventResult::NotCanceled)
         return doubleClickDispatchResult;
     return dispatchResult;
 }
 
 } // namespace blink