Make DRT output for FEBlend::m_mode lowercase

Source/platform/graphics/filters/FEBlend.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) 2012 Nokia Corporation and/or its subsidiary(-ies)
  * 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 196 matching lines @@
     RefPtr<SkImageFilter> background(builder->build(inputEffect(1), operatingColorSpace()));
     SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(toSkiaMode(m_mode)));
     SkImageFilter::CropRect cropRect = getCropRect(builder->cropOffset());
     return adoptRef(SkXfermodeImageFilter::Create(mode, background.get(), foreground.get(), &cropRect));
 }
 
 static TextStream& operator<<(TextStream& ts, const BlendModeType& type)
 {
     switch (type) {
     case FEBLEND_MODE_UNKNOWN:
-        ts << "UNKNOWN";
+        ts << "unknown";
         break;
     case FEBLEND_MODE_NORMAL:
-        ts << "NORMAL";
+        ts << "normal";
         break;
     case FEBLEND_MODE_MULTIPLY:
-        ts << "MULTIPLY";
+        ts << "multiply";
         break;
     case FEBLEND_MODE_SCREEN:
-        ts << "SCREEN";
+        ts << "screen";
         break;
     case FEBLEND_MODE_DARKEN:
-        ts << "DARKEN";
+        ts << "darken";
         break;
     case FEBLEND_MODE_LIGHTEN:
-        ts << "LIGHTEN";
+        ts << "lighten";
         break;
     }
     return ts;
 }
 
 TextStream& FEBlend::externalRepresentation(TextStream& ts, int indent) const
 {
     writeIndent(ts, indent);
     ts << "[feBlend";
     FilterEffect::externalRepresentation(ts);
     ts << " mode=\"" << m_mode << "\"]\n";
     inputEffect(0)->externalRepresentation(ts, indent + 1);
     inputEffect(1)->externalRepresentation(ts, indent + 1);
     return ts;
 }
 
 } // namespace blink