[CSS Grid Layout] Remove stack from grid-auto-flow syntax

Source/core/rendering/style/RenderStyleConstants.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 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 449 matching lines @@
 enum ImageResolutionSnap { ImageResolutionNoSnap = 0, ImageResolutionSnapPixels };
 
 enum Order { LogicalOrder = 0, VisualOrder };
 
 enum WrapFlow { WrapFlowAuto, WrapFlowBoth, WrapFlowStart, WrapFlowEnd, WrapFlowMaximum, WrapFlowClear };
 
 enum WrapThrough { WrapThroughWrap, WrapThroughNone };
 
 enum RubyPosition { RubyPositionBefore, RubyPositionAfter };
 
-static const size_t GridAutoFlowBits = 5;
+static const size_t GridAutoFlowBits = 4;
 enum InternalGridAutoFlowAlgorithm {
     InternalAutoFlowAlgorithmSparse = 0x1,
-    InternalAutoFlowAlgorithmDense = 0x2,
-    InternalAutoFlowAlgorithmStack = 0x4
+    InternalAutoFlowAlgorithmDense = 0x2
 };
 
 enum InternalGridAutoFlowDirection {
-    InternalAutoFlowDirectionRow = 0x8,
-    InternalAutoFlowDirectionColumn = 0x10
+    InternalAutoFlowDirectionRow = 0x4,
+    InternalAutoFlowDirectionColumn = 0x8
 };
 
 enum GridAutoFlow {
     AutoFlowRow = InternalAutoFlowAlgorithmSparse | InternalAutoFlowDirectionRow,
     AutoFlowColumn = InternalAutoFlowAlgorithmSparse | InternalAutoFlowDirectionColumn,
     AutoFlowRowDense = InternalAutoFlowAlgorithmDense | InternalAutoFlowDirectionRow,
-    AutoFlowColumnDense = InternalAutoFlowAlgorithmDense | InternalAutoFlowDirectionColumn,
-    AutoFlowStackRow = InternalAutoFlowAlgorithmStack | InternalAutoFlowDirectionRow,
-    AutoFlowStackColumn = InternalAutoFlowAlgorithmStack | InternalAutoFlowDirectionColumn
+    AutoFlowColumnDense = InternalAutoFlowAlgorithmDense | InternalAutoFlowDirectionColumn
 };
 
 enum DraggableRegionMode { DraggableRegionNone, DraggableRegionDrag, DraggableRegionNoDrag };
 
 static const size_t TouchActionBits = 4;
 enum TouchAction {
     TouchActionAuto = 0x0,
     TouchActionNone = 0x1,
     TouchActionPanX = 0x2,
     TouchActionPanY = 0x4,
@@ skipping 69 matching lines @@
 static const float maximumAllowedFontSize = 1000000.0f;
 
 enum TextIndentLine { TextIndentFirstLine, TextIndentEachLine };
 enum TextIndentType { TextIndentNormal, TextIndentHanging };
 
 enum CSSBoxType { BoxMissing = 0, MarginBox, BorderBox, PaddingBox, ContentBox };
 
 } // namespace blink
 
 #endif // RenderStyleConstants_h