Track reasons for |Node::SetNeedsStyleRecalc|

Source/core/html/HTMLPlugInElement.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * 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 242 matching lines @@
 }
 
 void HTMLPlugInElement::finishParsingChildren()
 {
     HTMLFrameOwnerElement::finishParsingChildren();
     if (useFallbackContent())
         return;
 
     setNeedsWidgetUpdate(true);
     if (inDocument())
-        setNeedsStyleRecalc(SubtreeStyleChange);
+        setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::Plugin));
 }
 
 void HTMLPlugInElement::resetInstance()
 {
     m_pluginWrapper.clear();
 }
 
 SharedPersistent<v8::Object>* HTMLPlugInElement::pluginWrapper()
 {
     LocalFrame* frame = document().frame();
@@ skipping 318 matching lines @@
 
 void HTMLPlugInElement::setUsePlaceholderContent(bool use)
 {
     if (use != m_usePlaceholderContent) {
         m_usePlaceholderContent = use;
         lazyReattachIfAttached();
     }
 }
 
 }