Add clean layout DCHECK to mostForwardCaretPosition()

third_party/WebKit/Source/core/editing/commands/ApplyStyleCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2008, 2009 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 1368 matching lines @@
                                           EditingState* editingState) {
   DCHECK(start.isNotNull());
   DCHECK(end.isNotNull());
   DCHECK(start.isConnected()) << start;
   DCHECK(end.isConnected()) << end;
   DCHECK(Position::commonAncestorTreeScope(start, end)) << start << " " << end;
   DCHECK_LE(start, end);
   // FIXME: We should assert that start/end are not in the middle of a text
   // node.
 
+  // TODO(editing-dev): Use of updateStyleAndLayoutIgnorePendingStylesheets
+  // needs to be audited.  See http://crbug.com/590369 for more details.
+  document().updateStyleAndLayoutIgnorePendingStylesheets();
+
   Position pushDownStart = mostForwardCaretPosition(start);
   // If the pushDownStart is at the end of a text node, then this node is not
   // fully selected. Move it to the next deep quivalent position to avoid
   // removing the style from this node. e.g. if pushDownStart was at
   // Position("hello", 5) in <b>hello<div>world</div></b>, we want
   // Position("world", 0) instead.
   Node* pushDownStartContainer = pushDownStart.computeContainerNode();
   if (pushDownStartContainer && pushDownStartContainer->isTextNode() &&
       pushDownStart.computeOffsetInContainerNode() ==
           pushDownStartContainer->maxCharacterOffset())
@@ skipping 613 matching lines @@
 
 DEFINE_TRACE(ApplyStyleCommand) {
   visitor->trace(m_style);
   visitor->trace(m_start);
   visitor->trace(m_end);
   visitor->trace(m_styledInlineElement);
   CompositeEditCommand::trace(visitor);
 }
 
 }  // namespace blink