Temporarily disable assert in FrameView::updateWidgets().

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 1917 matching lines @@
 
     // scrollRectToVisible can call into setScrollPosition(), which resets m_maintainScrollPositionAnchor.
     m_maintainScrollPositionAnchor = anchorNode;
 }
 
 bool FrameView::updateWidgets()
 {
     // This is always called from updateWidgetsTimerFired.
     // m_updateWidgetsTimer should only be scheduled if we have widgets to update.
     // Thus I believe we can stop checking isEmpty here, and just ASSERT isEmpty:
-    ASSERT(!m_partUpdateSet.isEmpty());
+    // FIXME: This assert has been temporarily removed due to https://crbug.com/430344
     if (m_nestedLayoutCount > 1 || m_partUpdateSet.isEmpty())
         return true;
 
     // Need to swap because script will run inside the below loop and invalidate the iterator.
     EmbeddedObjectSet objects;
     objects.swap(m_partUpdateSet);
 
     for (const auto& embeddedObject : objects) {
         RenderEmbeddedObject& object = *embeddedObject;
         HTMLPlugInElement* element = toHTMLPlugInElement(object.node());
@@ skipping 1985 matching lines @@
         return;
 
     ScrollableArea::setScrollOrigin(origin);
 
     // Update if the scroll origin changes, since our position will be different if the content size did not change.
     if (updatePositionAtAll && updatePositionSynchronously)
         updateScrollbars(scrollOffsetDouble());
 }
 
 } // namespace blink