Cursor should respect text align in contenteditable with pseudo element

third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 925 matching lines @@
     // If there is a continuation then we need to consult it here, since this is
     // the root of the tree walk and it wouldn't otherwise get picked up.
     // Continuations should always be siblings in the tree, so any others should
     // get picked up already by the tree walk.
     if (continuation())
         continuation()->computeLayerHitTestRects(rects);
 }
 
 LayoutRect LayoutBoxModelObject::localCaretRectForEmptyElement(LayoutUnit width, LayoutUnit textIndentOffset)
 {
-    ASSERT(!slowFirstChild());
+    DCHECK(!slowFirstChild() || slowFirstChild()->isPseudoElement());
 
     // FIXME: This does not take into account either :first-line or :first-letter
     // However, as soon as some content is entered, the line boxes will be
     // constructed and this kludge is not called any more. So only the caret size
     // of an empty :first-line'd block is wrong. I think we can live with that.
     const ComputedStyle& currentStyle = firstLineStyleRef();
 
     enum CaretAlignment { AlignLeft, AlignRight, AlignCenter };
 
     CaretAlignment alignment = AlignLeft;
@@ skipping 177 matching lines @@
     if (rootElementStyle->hasBackground())
         return false;
 
     if (node() != document().firstBodyElement())
         return false;
 
     return true;
 }
 
 } // namespace blink