Add loadedNonEmptyDocument flag in iframe for Resource Timing

Source/core/html/HTMLIFrameElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann (hausmann@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Ericsson AB. 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
@@ skipping 23 matching lines @@
 #include "core/page/Frame.h"
 #include "core/rendering/RenderIFrame.h"
 #include <wtf/text/TextPosition.h>
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 inline HTMLIFrameElement::HTMLIFrameElement(const QualifiedName& tagName, Document* document)
     : HTMLFrameElementBase(tagName, document)
+    , m_didLoadNonEmptyDocument(false)
 {
     ASSERT(hasTagName(iframeTag));
     ScriptWrappable::init(this);
     setHasCustomStyleCallbacks();
 }
 
 PassRefPtr<HTMLIFrameElement> HTMLIFrameElement::create(const QualifiedName& tagName, Document* document)
 {
     return adoptRef(new HTMLIFrameElement(tagName, document));
 }
@@ skipping 79 matching lines @@
 void HTMLIFrameElement::didRecalcStyle(StyleChange styleChange)
 {
     if (!shouldDisplaySeamlessly())
         return;
     Document* childDocument = contentDocument();
     if (styleChange >= Inherit || childDocument->childNeedsStyleRecalc() || childDocument->needsStyleRecalc())
         contentDocument()->recalcStyle(styleChange);
 }
 
 }