First pass at removing position:fixed.

sky/engine/core/rendering/RenderGeometryMapStep.h

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Google 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
@@ skipping 22 matching lines @@
 
 namespace blink {
 
 class RenderObject;
 
 // Stores data about how to map from one renderer to its container.
 struct RenderGeometryMapStep {
     RenderGeometryMapStep(const RenderGeometryMapStep& o)
         : m_renderer(o.m_renderer)
         , m_offset(o.m_offset)
-        , m_offsetForFixedPosition(o.m_offsetForFixedPosition)
         , m_accumulatingTransform(o.m_accumulatingTransform)
         , m_isNonUniform(o.m_isNonUniform)
-        , m_isFixedPosition(o.m_isFixedPosition)
         , m_hasTransform(o.m_hasTransform)
     {
         ASSERT(!o.m_transform);
     }
-    RenderGeometryMapStep(const RenderObject* renderer, bool accumulatingTransform, bool isNonUniform, bool isFixedPosition, bool hasTransform)
+    RenderGeometryMapStep(const RenderObject* renderer, bool accumulatingTransform, bool isNonUniform, bool hasTransform)
         : m_renderer(renderer)
         , m_accumulatingTransform(accumulatingTransform)
         , m_isNonUniform(isNonUniform)
-        , m_isFixedPosition(isFixedPosition)
         , m_hasTransform(hasTransform)
     {
     }
     const RenderObject* m_renderer;
     LayoutSize m_offset;
     OwnPtr<TransformationMatrix> m_transform; // Includes offset if non-null.
-    LayoutSize m_offsetForFixedPosition;
     bool m_accumulatingTransform;
     bool m_isNonUniform; // Mapping depends on the input point, e.g. because of CSS columns.
-    bool m_isFixedPosition;
     bool m_hasTransform;
 };
 
 } // namespace blink
 
 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::RenderGeometryMapStep);
 
 #endif // RenderGeometryMapStep_h