[css-flexbox] logical widths are always definite.

third_party/WebKit/Source/core/layout/LayoutBox.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 2236 matching lines @@
         containerWidthInInlineDirection = perpendicularContainingBlockLogicalHeight();
 
     // Width calculations
     if (treatAsReplaced) {
         computedValues.m_extent = LayoutUnit(logicalWidthLength.value()) + borderAndPaddingLogicalWidth();
     } else if (parent()->isLayoutGrid() && style()->logicalWidth().isAuto() && style()->logicalMinWidth().isAuto() && style()->overflowX() == OverflowVisible && containerWidthInInlineDirection < minPreferredLogicalWidth()) {
         // TODO (lajava) Move this logic to the LayoutGrid class.
         // Implied minimum size of Grid items.
         computedValues.m_extent = constrainLogicalWidthByMinMax(minPreferredLogicalWidth(), containerWidthInInlineDirection, cb);
     } else {
-        if (!hasPerpendicularContainingBlock && cb->isFlexItem() && styleToUse.logicalWidth().hasPercent() && !isOutOfFlowPositioned()) {
-            LayoutUnit stretchedWidth = toLayoutFlexibleBox(cb->parent())->childLogicalWidthForPercentageResolution(*cb);
-            if (stretchedWidth != LayoutUnit(-1))
-                containerWidthInInlineDirection = stretchedWidth;
-        }
         LayoutUnit preferredWidth = computeLogicalWidthUsing(MainOrPreferredSize, styleToUse.logicalWidth(), containerWidthInInlineDirection, cb);
         computedValues.m_extent = constrainLogicalWidthByMinMax(preferredWidth, containerWidthInInlineDirection, cb);
     }
 
     // Margin calculations.
     computeMarginsForDirection(InlineDirection, cb, containerLogicalWidth, computedValues.m_extent, computedValues.m_margins.m_start,
         computedValues.m_margins.m_end, style()->marginStart(), style()->marginEnd());
 
     if (!hasPerpendicularContainingBlock && containerLogicalWidth && containerLogicalWidth != (computedValues.m_extent + computedValues.m_margins.m_start + computedValues.m_margins.m_end)
         && !isFloating() && !isInline() && !cb->isFlexibleBoxIncludingDeprecated() && !cb->isLayoutGrid()) {
@@ skipping 2679 matching lines @@
         m_rareData->m_snapAreas->remove(&snapArea);
     }
 }
 
 SnapAreaSet* LayoutBox::snapAreas() const
 {
     return m_rareData ? m_rareData->m_snapAreas.get() : nullptr;
 }
 
 } // namespace blink