[CSS Grid Layout] Support calc() breadth track size

Source/core/rendering/RenderGrid.cpp

 /*
  * Copyright (C) 2011 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 393 matching lines @@
     }
 }
 
 LayoutUnit RenderGrid::computeUsedBreadthOfMinLength(TrackSizingDirection direction, const GridLength& gridLength) const
 {
     if (gridLength.isFlex())
         return 0;
 
     const Length& trackLength = gridLength.length();
     ASSERT(!trackLength.isAuto());
-    if (trackLength.isFixed() || trackLength.isPercent() || trackLength.isViewportPercentage())
+    if (trackLength.isSpecified())
         return computeUsedBreadthOfSpecifiedLength(direction, trackLength);
 
     ASSERT(trackLength.isMinContent() || trackLength.isMaxContent());
     return 0;
 }
 
 LayoutUnit RenderGrid::computeUsedBreadthOfMaxLength(TrackSizingDirection direction, const GridLength& gridLength, LayoutUnit usedBreadth) const
 {
     if (gridLength.isFlex())
         return usedBreadth;
 
     const Length& trackLength = gridLength.length();
     ASSERT(!trackLength.isAuto());
-    if (trackLength.isFixed() || trackLength.isPercent() || trackLength.isViewportPercentage()) {
+    if (trackLength.isSpecified()) {
         LayoutUnit computedBreadth = computeUsedBreadthOfSpecifiedLength(direction, trackLength);
         ASSERT(computedBreadth != infinity);
         return computedBreadth;
     }
 
     ASSERT(trackLength.isMinContent() || trackLength.isMaxContent());
     return infinity;
 }
 
 LayoutUnit RenderGrid::computeUsedBreadthOfSpecifiedLength(TrackSizingDirection direction, const Length& trackLength) const
 {
-    // FIXME: We still need to support calc() here (https://webkit.org/b/103761).
-    ASSERT(trackLength.isFixed() || trackLength.isPercent() || trackLength.isViewportPercentage());
+    ASSERT(trackLength.isSpecified());
     // FIXME: The -1 here should be replaced by whatever the intrinsic height of the grid is.
     return valueForLength(trackLength, direction == ForColumns ? logicalWidth() : computeContentLogicalHeight(style()->logicalHeight(), -1), view());
 }
 
 static bool sortByGridNormalizedFlexValue(const GridTrackForNormalization& track1, const GridTrackForNormalization& track2)
 {
     return track1.m_normalizedFlexValue < track2.m_normalizedFlexValue;
 }
 
 double RenderGrid::computeNormalizedFractionBreadth(Vector<GridTrack>& tracks, TrackSizingDirection direction, LayoutUnit availableLogicalSpace) const
@@ skipping 738 matching lines @@
     if (isOutOfFlowPositioned())
         return "RenderGrid (positioned)";
     if (isAnonymous())
         return "RenderGrid (generated)";
     if (isRelPositioned())
         return "RenderGrid (relative positioned)";
     return "RenderGrid";
 }
 
 } // namespace WebCore