Pixel snap SVG's root border box to local transform [spv2]

third_party/WebKit/Source/core/paint/SVGPaintContext.h

 /**
  * Copyright (C) 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2012 Zoltan Herczeg <zherczeg@webkit.org>.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 43 matching lines @@
         : TransformRecorder(context, object, transform)
     {
         if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
             const auto* objectProperties = object.objectPaintProperties();
             if (!objectProperties)
                 return;
             if (object.isSVGRoot()) {
                 // If a transform exists, we can rely on a layer existing to apply it.
                 DCHECK(!objectProperties || !objectProperties->transform() || object.hasLayer());
                 if (objectProperties->svgLocalToBorderBoxTransform()) {
-                    // FIXME(pdr): Enable the following DCHECK once the pixel snapping logic has
-                    // been included in svgLocalToBorderBox.
-                    // DCHECK(objectProperties->svgLocalToBorderBoxTransform()->matrix() == transform.toTransformationMatrix());
+                    DCHECK(objectProperties->svgLocalToBorderBoxTransform()->matrix() == transform.toTransformationMatrix());
                     auto& paintController = context.getPaintController();
                     PaintChunkProperties properties(paintController.currentPaintChunkProperties());
                     properties.transform = objectProperties->svgLocalToBorderBoxTransform();
                     m_transformPropertyScope.emplace(paintController, properties);
                 }
             } else {
                 DCHECK(object.isSVG());
                 // Should only be used by LayoutSVGRoot.
                 DCHECK(!objectProperties->svgLocalToBorderBoxTransform());
 
@@ skipping 64 matching lines @@
     std::unique_ptr<ClipPathRecorder> m_clipPathRecorder;
     std::unique_ptr<SVGFilterRecordingContext> m_filterRecordingContext;
 #if ENABLE(ASSERT)
     bool m_applyClipMaskAndFilterIfNecessaryCalled;
 #endif
 };
 
 } // namespace blink
 
 #endif // SVGPaintContext_h