First pass at removing position:fixed.

sky/engine/core/rendering/RenderView.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 186 matching lines @@
 
     if (!paintInvalidationContainer && mode & UseTransforms && shouldUseTransformFromContainer(0)) {
         TransformationMatrix t;
         getTransformFromContainer(0, LayoutSize(), t);
         transformState.applyTransform(t);
     }
 }
 
 const RenderObject* RenderView::pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap& geometryMap) const
 {
-    // FIXME(sky): Can we remove offsetForFixedPosition?
-    LayoutSize offsetForFixedPosition;
     LayoutSize offset;
     RenderObject* container = 0;
 
     // If a container was specified, and was not 0 or the RenderView, then we
     // should have found it by now unless we're traversing to a parent document.
     ASSERT_ARG(ancestorToStopAt, !ancestorToStopAt || ancestorToStopAt == this || container);
 
     if ((!ancestorToStopAt || container) && shouldUseTransformFromContainer(container)) {
         TransformationMatrix t;
         getTransformFromContainer(container, LayoutSize(), t);
-        geometryMap.push(this, t, false, false, false, true, offsetForFixedPosition);
+        geometryMap.push(this, t, false, false, true);
     } else {
-        geometryMap.push(this, offset, false, false, false, false, offsetForFixedPosition);
+        geometryMap.push(this, offset, false, false, false);
     }
 
     return container;
 }
 
 void RenderView::mapAbsoluteToLocalPoint(MapCoordinatesFlags mode, TransformState& transformState) const
 {
     if (mode & UseTransforms && shouldUseTransformFromContainer(0)) {
         TransformationMatrix t;
         getTransformFromContainer(0, LayoutSize(), t);
@@ skipping 562 matching lines @@
     return viewWidth(IncludeScrollbars) / scale;
 }
 
 double RenderView::layoutViewportHeight() const
 {
     float scale = m_frameView ? m_frameView->frame().pageZoomFactor() : 1;
     return viewHeight(IncludeScrollbars) / scale;
 }
 
 } // namespace blink