Blur immediately if an attribute change made an element unfocasable.

third_party/WebKit/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.
@@ skipping 2173 matching lines @@
   // a paint for many seconds.
   if (isRenderingReady() && body() &&
       !styleEngine().hasPendingScriptBlockingSheets()) {
     if (!m_documentTiming.firstLayout())
       m_documentTiming.markFirstLayout();
   }
 
   m_rootScrollerController->didUpdateLayout();
 }
 
-void Document::setNeedsFocusedElementCheck() {
-  setNeedsStyleRecalc(
-      LocalStyleChange,
-      StyleChangeReasonForTracing::createWithExtraData(
-          StyleChangeReason::PseudoClass, StyleChangeExtraData::Focus));
-}
-
 void Document::clearFocusedElementSoon() {
   if (!m_clearFocusedElementTimer.isActive())
     m_clearFocusedElementTimer.startOneShot(0, BLINK_FROM_HERE);
 }
 
 void Document::clearFocusedElementTimerFired(TimerBase*) {
   updateStyleAndLayoutTree();
 
   if (m_focusedElement && !m_focusedElement->isFocusable())
     m_focusedElement->blur();
@@ skipping 4375 matching lines @@
 }
 
 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().getString().utf8().data());
 }
 #endif