Centralize TextStream functions to remove RenderTreeAsText dependency of the filters

Source/core/platform/graphics/filters/FEComposite.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2013 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 15 matching lines @@
 
 #include "core/platform/graphics/filters/FEComposite.h"
 
 #include "SkArithmeticMode.h"
 #include "SkFlattenableBuffers.h"
 #include "SkXfermodeImageFilter.h"
 
 #include "core/platform/graphics/GraphicsContext.h"
 #include "core/platform/graphics/cpu/arm/filters/FECompositeArithmeticNEON.h"
 #include "core/platform/graphics/filters/Filter.h"
-#include "core/rendering/RenderTreeAsText.h"
 #include "platform/text/TextStream.h"
 #include "third_party/skia/include/core/SkDevice.h"
 
 #include "wtf/Uint8ClampedArray.h"
 
 #include "core/platform/graphics/filters/SkiaImageFilterBuilder.h"
 
 namespace WebCore {
 
 class CompositeImageFilter : public SkImageFilter {
@@ skipping 405 matching lines @@
     ts << " operation=\"" << m_type << "\"";
     if (m_type == FECOMPOSITE_OPERATOR_ARITHMETIC)
         ts << " k1=\"" << m_k1 << "\" k2=\"" << m_k2 << "\" k3=\"" << m_k3 << "\" k4=\"" << m_k4 << "\"";
     ts << "]\n";
     inputEffect(0)->externalRepresentation(ts, indent + 1);
     inputEffect(1)->externalRepresentation(ts, indent + 1);
     return ts;
 }
 
 } // namespace WebCore