Fix flaky crash in WebPagePopupImpl::closePopup.

Source/core/html/HTMLInputElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
@@ skipping 1505 matching lines @@
     }
     HTMLTextFormControlElement::insertedInto(insertionPoint);
     if (insertionPoint->inDocument() && !form())
         addToRadioButtonGroup();
     resetListAttributeTargetObserver();
     return InsertionShouldCallDidNotifySubtreeInsertions;
 }
 
 void HTMLInputElement::removedFrom(ContainerNode* insertionPoint)
 {
+    m_inputTypeView->closePopupView();
     if (insertionPoint->inDocument() && !form())
         removeFromRadioButtonGroup();
     HTMLTextFormControlElement::removedFrom(insertionPoint);
     ASSERT(!inDocument());
     resetListAttributeTargetObserver();
 }
 
 void HTMLInputElement::didMoveToNewDocument(Document& oldDocument)
 {
     if (imageLoader())
@@ skipping 389 matching lines @@
 void HTMLInputElement::ensurePrimaryContent()
 {
     m_inputTypeView->ensurePrimaryContent();
 }
 
 bool HTMLInputElement::hasFallbackContent() const
 {
     return m_inputTypeView->hasFallbackContent();
 }
 } // namespace