Add delay to didAssociateFormControlsTimer so it doesn't fire too frequently

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.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 5708 matching lines @@
     m_templateDocument->m_templateDocumentHost = this; // balanced in dtor.
 
     return *m_templateDocument.get();
 }
 
 void Document::didAssociateFormControl(Element* element)
 {
     if (!frame() || !frame()->page())
         return;
     m_associatedFormControls.add(element);
+    // We add a slight delay because this could be called rapidly.
     if (!m_didAssociateFormControlsTimer.isActive())
-        m_didAssociateFormControlsTimer.startOneShot(0, BLINK_FROM_HERE);
+        m_didAssociateFormControlsTimer.startOneShot(0.3, BLINK_FROM_HERE);
 }
 
 void Document::removeFormAssociation(Element* element)
 {
     auto it = m_associatedFormControls.find(element);
     if (it == m_associatedFormControls.end())
         return;
     m_associatedFormControls.remove(it);
     if (m_associatedFormControls.isEmpty())
         m_didAssociateFormControlsTimer.stop();
@@ skipping 292 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