Make sure Document::updateLayoutTree*() is called before Element::isFocusable().

third_party/WebKit/Source/core/editing/FrameSelection.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1085 matching lines @@
     bool caretBrowsing = m_frame->settings() && m_frame->settings()->caretBrowsingEnabled();
     if (caretBrowsing) {
         if (Element* anchor = enclosingAnchorElement(base())) {
             m_frame->page()->focusController().setFocusedElement(anchor, m_frame);
             return;
         }
     }
 
     if (Element* target = rootEditableElement()) {
         // Walk up the DOM tree to search for a node to focus.
+        m_frame->document()->updateLayoutTreeIgnorePendingStylesheets();
         while (target) {
             // We don't want to set focus on a subframe when selecting in a parent frame,
             // so add the !isFrameElement check here. There's probably a better way to make this
             // work in the long term, but this is the safest fix at this time.
             if (target->isMouseFocusable() && !isFrameElement(target)) {
                 m_frame->page()->focusController().setFocusedElement(target, m_frame);
                 return;
             }
             target = target->parentOrShadowHostElement();
         }
@@ skipping 308 matching lines @@
 
 void showTree(const blink::FrameSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
     else
         fprintf(stderr, "Cannot showTree for (nil) FrameSelection.\n");
 }
 
 #endif