Decouple content transform fiddling from SVGRenderingContext::renderSubtree

Source/core/svg/graphics/filters/SVGFEImage.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) 2010 Dirk Schulze <krit@webkit.org>
  * 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
  * License as published by the Free Software Foundation; either
@@ skipping 147 matching lines @@
         // Build up a transformation that maps from the viewport space to the filter primitive subregion.
         if (lengthContext.determineViewport(viewportSize))
             transform = makeMapBetweenRects(FloatRect(FloatPoint(), viewportSize), dstRect);
     } else {
         transform.translate(dstRect.x(), dstRect.y());
     }
 
     GraphicsContext* context = builder->context();
     if (!context)
         return adoptRef(SkBitmapSource::Create(SkBitmap()));
-    AffineTransform contentTransformation;
     FloatRect bounds(FloatPoint(), dstRect.size());
     context->save();
     context->beginRecording(bounds);
     context->concatCTM(transform);
-    SVGRenderingContext::renderSubtree(context, renderer, contentTransformation);
+    SVGRenderingContext::renderSubtree(context, renderer);
     RefPtr<DisplayList> displayList = context->endRecording();
     context->restore();
     RefPtr<SkImageFilter> result = adoptRef(SkPictureImageFilter::Create(displayList->picture(), dstRect));
     return result.release();
 }
 
 PassRefPtr<SkImageFilter> FEImage::createImageFilter(SkiaImageFilterBuilder* builder)
 {
     RenderObject* renderer = referencedRenderer();
     if (!m_image && !renderer)
@@ skipping 15 matching lines @@
     m_preserveAspectRatio->transformRect(dstRect, srcRect);
 
     if (!m_image->nativeImageForCurrentFrame())
         return adoptRef(SkBitmapSource::Create(SkBitmap()));
 
     RefPtr<SkImageFilter> result = adoptRef(SkBitmapSource::Create(m_image->nativeImageForCurrentFrame()->bitmap(), srcRect, dstRect));
     return result.release();
 }
 
 } // namespace blink