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

Source/core/rendering/RenderBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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
@@ skipping 2151 matching lines @@
         // https://bugs.webkit.org/show_bug.cgi?id=46418
         bool inHorizontalBox = parent()->isDeprecatedFlexibleBox() && parent()->style()->boxOrient() == HORIZONTAL;
         bool stretching = parent()->style()->boxAlign() == BSTRETCH;
         bool treatAsReplaced = shouldComputeSizeAsReplaced() && (!inHorizontalBox || !stretching);
         bool checkMinMaxHeight = false;
 
         // The parent box is flexing us, so it has increased or decreased our height.  We have to
         // grab our cached flexible height.
         // FIXME: Account for block-flow in flexible boxes.
         // https://bugs.webkit.org/show_bug.cgi?id=46418
-        if (hasOverrideHeight() && parent()->isFlexibleBoxIncludingDeprecated())
+        if (hasOverrideHeight() && (parent()->isFlexibleBoxIncludingDeprecated() || parent()->isRenderGrid()))
             h = Length(overrideLogicalContentHeight(), Fixed);
         else if (treatAsReplaced)
             h = Length(computeReplacedLogicalHeight(), Fixed);
         else {
             h = style()->logicalHeight();
             checkMinMaxHeight = true;
         }
 
         // Block children of horizontal flexible boxes fill the height of the box.
         // FIXME: Account for block-flow in flexible boxes.
@@ skipping 2252 matching lines @@
 
     setLogicalTop(oldLogicalTop);
     setLogicalWidth(oldLogicalWidth);
     setMarginLeft(oldMarginLeft);
     setMarginRight(oldMarginRight);
 
     return borderBox;
 }
 
 } // namespace blink