[css-flexbox] Correctly resolve percentages in children of stretched flex items

third_party/WebKit/Source/core/layout/LayoutBox.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007 Apple Inc. 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 742 matching lines @@
 
     virtual void markForPaginationRelayoutIfNeeded(SubtreeLayoutScope&);
 
     bool isWritingModeRoot() const { return !parent() || parent()->style()->writingMode() != style()->writingMode(); }
     bool isOrthogonalWritingModeRoot() const { return parent() && parent()->isHorizontalWritingMode() != isHorizontalWritingMode(); }
     void markOrthogonalWritingModeRoot();
     void unmarkOrthogonalWritingModeRoot();
 
     bool isDeprecatedFlexItem() const { return !isInline() && !isFloatingOrOutOfFlowPositioned() && parent() && parent()->isDeprecatedFlexibleBox(); }
     bool isFlexItemIncludingDeprecated() const { return !isInline() && !isFloatingOrOutOfFlowPositioned() && parent() && parent()->isFlexibleBoxIncludingDeprecated(); }
+    bool isFlexItem() const { return !isInline() && !isFloatingOrOutOfFlowPositioned() && parent() && parent()->isFlexibleBox(); }
 
     bool isGridItem() const { return parent() && parent()->isLayoutGrid(); }
 
     LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const override;
     int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const override;
 
     LayoutUnit offsetLeft() const override;
     LayoutUnit offsetTop() const override;
 
     LayoutPoint flipForWritingModeForChild(const LayoutBox* child, const LayoutPoint&) const;
@@ skipping 358 matching lines @@
         if (UNLIKELY(m_inlineBoxWrapper != nullptr))
             deleteLineBoxWrapper();
     }
 
     m_inlineBoxWrapper = boxWrapper;
 }
 
 } // namespace blink
 
 #endif // LayoutBox_h