Fix CSS reference filters with negative transformed children.

third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 297 matching lines @@
 {
     setOffsetDoubleFromLayoutObject(offset);
 }
 
 void GraphicsLayer::setOffsetDoubleFromLayoutObject(const DoubleSize& offset, ShouldSetNeedsDisplay shouldSetNeedsDisplay)
 {
     if (offset == m_offsetFromLayoutObject)
         return;
 
     m_offsetFromLayoutObject = offset;
+    platformLayer()->setFiltersOrigin(FloatPoint() - toFloatSize(offset));
 
     // If the compositing layer offset changes, we need to repaint.
     if (shouldSetNeedsDisplay == SetNeedsDisplay)
         setNeedsDisplay();
 }
 
 LayoutSize GraphicsLayer::offsetFromLayoutObjectWithSubpixelAccumulation() const
 {
     return LayoutSize(offsetFromLayoutObject()) + client()->subpixelAccumulation();
 }
@@ skipping 1022 matching lines @@
 {
     if (!layer) {
         fprintf(stderr, "Cannot showGraphicsLayerTree for (nil).\n");
         return;
     }
 
     String output = layer->layerTreeAsText(blink::LayerTreeIncludesDebugInfo);
     fprintf(stderr, "%s\n", output.utf8().data());
 }
 #endif