[CSS Grid Layout] Don't resolve align-self and justify-self properties

Source/core/rendering/RenderFlexibleBox.cpp

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 178 matching lines @@
         return baseline;
 
     int marginAscent = direction == HorizontalLine ? marginTop() : marginRight();
     return synthesizedBaselineFromContentBox(this, direction) + marginAscent;
 }
 
 static ItemPosition resolveAlignment(const RenderStyle* parentStyle, const RenderStyle* childStyle)
 {
     ItemPosition align = childStyle->alignSelf();
     if (align == ItemPositionAuto)
-        align = (parentStyle->alignItems() == ItemPositionAuto) ? ItemPositionStretch : parentStyle->alignItems();
+        align = (parentStyle->alignItems() == ItemPositionAuto) ? ItemPositionStretch: parentStyle->alignItems();
     return align;
 }
 
 void RenderFlexibleBox::removeChild(RenderObject* child)
 {
     RenderBlock::removeChild(child);
     m_intrinsicSizeAlongMainAxis.remove(child);
 }
 
 void RenderFlexibleBox::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
@@ skipping 1103 matching lines @@
                 break;
             }
             case ItemPositionLastBaseline:
             case ItemPositionSelfStart:
             case ItemPositionSelfEnd:
             case ItemPositionStart:
             case ItemPositionEnd:
             case ItemPositionLeft:
             case ItemPositionRight:
                 // FIXME: File a bug about implementing that. The extended grammar
-                // is not enabled by default so we shouldn't hit this codepath.
+                // is not implemented yet so we default to "stretch" for now.
+                break;
+            default:
                 ASSERT_NOT_REACHED();
                 break;
             }
         }
         minMarginAfterBaselines.append(minMarginAfterBaseline);
     }
 
     if (style()->flexWrap() != FlexWrapReverse)
         return;
 
@@ skipping 67 matching lines @@
             ASSERT(child);
             LayoutUnit lineCrossAxisExtent = lineContexts[lineNumber].crossAxisExtent;
             LayoutUnit originalOffset = lineContexts[lineNumber].crossAxisOffset - crossAxisStartEdge;
             LayoutUnit newOffset = contentExtent - originalOffset - lineCrossAxisExtent;
             adjustAlignmentForChild(child, newOffset - originalOffset);
         }
     }
 }
 
 }