Convert first letter into a pseudo element.

Source/core/rendering/RenderText.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 1392 matching lines @@
     if (lastTypedCharacterOffsetToReveal >= 0) {
         m_text.replace(lastTypedCharacterOffsetToReveal, 1, String(&revealedText, 1));
         // m_text may be updated later before timer fires. We invalidate the lastTypedCharacterOffset to avoid inconsistency.
         secureTextTimer->invalidate();
     }
 }
 
 void RenderText::setText(PassRefPtr<StringImpl> text, bool force)
 {
     ASSERT(text);
-

[Julien - ping for review, 2014/10/17 16:49:59]

Unrelated change.

[dsinclair, 2014/10/17 17:21:39]

Done.

     if (!force && equal(m_text.impl(), text.get()))
         return;
 
     setTextInternal(text);
     // If preferredLogicalWidthsDirty() of an orphan child is true, RenderObjectChildList::
     // insertChildNode() fails to set true to owner. To avoid that, we call
     // setNeedsLayoutAndPrefWidthsRecalc() only if this RenderText has parent.
     if (parent())
         setNeedsLayoutAndPrefWidthsRecalc();
     m_knownToHaveNoOverflowAndNoFallbackFonts = false;
@@ skipping 439 matching lines @@
     }
     secureTextTimer->restartWithNewText(lastTypedCharacterOffset);
 }
 
 PassRefPtr<AbstractInlineTextBox> RenderText::firstAbstractInlineTextBox()
 {
     return AbstractInlineTextBox::getOrCreate(this, m_firstTextBox);
 }
 
 } // namespace blink