[css-grid] grid-auto-flow|row should take a <track-size>+

third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.cpp

Index: third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.cpp
diff --git a/third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.cpp b/third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.cpp
index ae4ba1fd6cbb8a3239efef6b9faa7b805dbb654d..471af30929ff5d6420635f39064832ff3af47e3e 100644
--- a/third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.cpp
+++ b/third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.cpp
@@ -818,6 +818,16 @@ static void addValuesForNamedGridLinesAtIndex(OrderedNamedLinesCollector& collec
         list.append(*lineNames);
 }
 
+static CSSValue* valueForGridTrackSizeList(GridTrackSizingDirection direction, const ComputedStyle& style)
+{
+    const Vector<GridTrackSize>& autoTrackSizes = direction == ForColumns ? style.gridAutoColumns() : style.gridAutoRows();
+
+    CSSValueList* list = CSSValueList::createSpaceSeparated();
+    for (auto& trackSize : autoTrackSizes)
+        list->append(*specifiedValueForGridTrackSize(trackSize, style));
+    return list;
+}
+
 static CSSValue* valueForGridTrackList(GridTrackSizingDirection direction, const LayoutObject* layoutObject, const ComputedStyle& style)
 {
     bool isRowAxis = direction == ForColumns;
@@ -1967,14 +1977,14 @@ const CSSValue* ComputedStyleCSSValueMapping::get(CSSPropertyID propertyID, cons
         return list;
     }
     // Specs mention that getComputedStyle() should return the used value of the property instead of the computed
-    // one for grid-definition-{rows|columns} but not for the grid-auto-{rows|columns} as things like
+    // one for grid-template-{rows|columns} but not for the grid-auto-{rows|columns} as things like
     // grid-auto-columns: 2fr; cannot be resolved to a value in pixels as the '2fr' means very different things
     // depending on the size of the explicit grid or the number of implicit tracks added to the grid. See
     // http://lists.w3.org/Archives/Public/www-style/2013Nov/0014.html
     case CSSPropertyGridAutoColumns:
-        return specifiedValueForGridTrackSize(style.gridAutoColumns(), style);
+        return valueForGridTrackSizeList(ForColumns, style);
     case CSSPropertyGridAutoRows:
-        return specifiedValueForGridTrackSize(style.gridAutoRows(), style);
+        return valueForGridTrackSizeList(ForRows, style);
 
     case CSSPropertyGridTemplateColumns:
         return valueForGridTrackList(ForColumns, layoutObject, style);