Trigger style recalc when the window's active state change

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 1912 matching lines @@
     if (!isActive())
         return;
 
     if (frameView->needsLayout())
         frameView->layout();
 
     if (lifecycle().state() < DocumentLifecycle::LayoutClean)
         lifecycle().advanceTo(DocumentLifecycle::LayoutClean);
 }
 
+
+void Document::updateRenderTreeOnFocusChanged()
+{
+    setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::createWithExtraData(StyleChangeReason::PseudoClass, StyleChangeExtraData::Focus));
+    updateRenderTreeIfNeeded();
+}
+
 void Document::setNeedsFocusedElementCheck()
 {
     setNeedsStyleRecalc(LocalStyleChange, StyleChangeReasonForTracing::createWithExtraData(StyleChangeReason::PseudoClass, StyleChangeExtraData::Focus));
 }
 
 void Document::clearFocusedElementSoon()
 {
     if (!m_clearFocusedElementTimer.isActive())
         m_clearFocusedElementTimer.startOneShot(0, FROM_HERE);
 }
@@ skipping 3878 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif