[CSS Grid Layout] Stretch value for align and justify properties.

Source/core/rendering/style/RenderStyle.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 327 matching lines @@
 
 public:
     static PassRefPtr<RenderStyle> create();
     static PassRefPtr<RenderStyle> createDefaultStyle();
     static PassRefPtr<RenderStyle> createAnonymousStyleWithDisplay(const RenderStyle* parentStyle, EDisplay);
     static PassRefPtr<RenderStyle> clone(const RenderStyle*);
 
     // Computes how the style change should be propagated down the tree.
     static StyleRecalcChange stylePropagationDiff(const RenderStyle* oldStyle, const RenderStyle* newStyle);
 
-    static ItemPosition resolveAlignment(const RenderStyle* parentStyle, const RenderStyle* childStyle);
+    static ItemPosition resolveAlignment(const RenderStyle* parentStyle, const RenderStyle* childStyle, ItemPosition resolvedAutoPositionForRenderer);
+    static ItemPosition resolveJustification(const RenderStyle* parentStyle, const RenderStyle* childStyle, ItemPosition resolvedAutoPositionForRenderer);
 
     StyleDifference visualInvalidationDiff(const RenderStyle&) const;
 
     enum IsAtShadowBoundary {
         AtShadowBoundary,
         NotAtShadowBoundary,
     };
 
     void inheritFrom(const RenderStyle* inheritParent, IsAtShadowBoundary = NotAtShadowBoundary);
     void copyNonInheritedFrom(const RenderStyle*);
@@ skipping 1550 matching lines @@
 inline bool RenderStyle::hasPseudoElementStyle() const
 {
     return noninherited_flags.pseudoBits & PSEUDO_ELEMENT_MASK;
 }
 
 float calcBorderRadiiConstraintScaleFor(const FloatRect&, const FloatRoundedRect::Radii&);
 
 } // namespace blink
 
 #endif // RenderStyle_h