Remove PaintBehavior. It's unused.

sky/engine/core/frame/LocalFrame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 294 matching lines @@
 void LocalFrame::deviceOrPageScaleFactorChanged()
 {
     document()->mediaQueryAffectingValueChanged();
 }
 
 void LocalFrame::removeSpellingMarkersUnderWords(const Vector<String>& words)
 {
     spellChecker().removeSpellingMarkersUnderWords(words);
 }
 
-struct ScopedFramePaintingState {
-    ScopedFramePaintingState(LocalFrame* frame)
-        : frame(frame)
-        , paintBehavior(frame->view()->paintBehavior())
-    {
-    }
-
-    ~ScopedFramePaintingState()
-    {
-        frame->view()->setPaintBehavior(paintBehavior);
-        frame->view()->setNodeToDraw(0);
-    }
-
-    LocalFrame* frame;
-    PaintBehavior paintBehavior;
-};
-
 double LocalFrame::devicePixelRatio() const
 {
     if (!m_host)
         return 0;
     return m_host->deviceScaleFactor();
 }
 
 } // namespace blink