[SPv2] Flatten property trees in PaintRecordBuilder into a single display list.

third_party/WebKit/Source/core/layout/svg/LayoutSVGResourcePattern.cpp

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright 2014 The Chromium Authors. 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 185 matching lines @@
     const FloatRect& tileBounds,
     const AffineTransform& tileTransform) const {
   DCHECK(!m_shouldCollectPatternAttributes);
 
   AffineTransform contentTransform;
   if (attributes().patternContentUnits() ==
       SVGUnitTypes::kSvgUnitTypeObjectboundingbox)
     contentTransform = tileTransform;
 
   FloatRect bounds(FloatPoint(), tileBounds.size());
-  PaintRecordBuilder builder(bounds);
-
   const LayoutSVGResourceContainer* patternLayoutObject =
       resolveContentElement();
   DCHECK(patternLayoutObject);
   DCHECK(!patternLayoutObject->needsLayout());
 
   SubtreeContentTransformScope contentTransformScope(contentTransform);
 
-  {
-    TransformRecorder transformRecorder(builder.context(), *patternLayoutObject,
-                                        tileTransform);
-    for (LayoutObject* child = patternLayoutObject->firstChild(); child;
-         child = child->nextSibling())
-      SVGPaintContext::paintResourceSubtree(builder.context(), child);
-  }
-
-  return builder.endRecording();
+  PaintRecordBuilder builder(bounds);
+  for (LayoutObject* child = patternLayoutObject->firstChild(); child;
+       child = child->nextSibling())
+    SVGPaintContext::paintResourceSubtree(builder.context(), child);
+  PaintRecorder paintRecorder;
+  PaintCanvas* canvas = paintRecorder.beginRecording(bounds);
+  canvas->save();
+  canvas->concat(affineTransformToSkMatrix(tileTransform));
+  canvas->drawPicture(builder.endRecording());
+  canvas->restore();
+  return paintRecorder.finishRecordingAsPicture();
 }
 
 }  // namespace blink