Flexbox: Allow intrinsic aspect ratios to inform main-size calculation

Source/core/rendering/RenderFlexibleBox.h

Index: Source/core/rendering/RenderFlexibleBox.h
diff --git a/Source/core/rendering/RenderFlexibleBox.h b/Source/core/rendering/RenderFlexibleBox.h
index 76d13eabc4fe00670c7a96d281827100a4af2399..20d713344019bd17f2df6fd3d65cdf17741c107b 100644
--- a/Source/core/rendering/RenderFlexibleBox.h
+++ b/Source/core/rendering/RenderFlexibleBox.h
@@ -122,6 +122,7 @@ private:
     LayoutUnit preferredMainAxisContentExtentForChild(RenderBox* child, bool hasInfiniteLineLength, bool relayoutChildren = false);
     bool childPreferredMainAxisContentExtentRequiresLayout(RenderBox* child, bool hasInfiniteLineLength) const;
     bool needToStretchChildLogicalHeight(RenderBox* child) const;
+    bool childHasFiniteCrossSize(RenderBox* child) const;
 
     void layoutFlexItems(bool relayoutChildren);
     LayoutUnit autoMarginOffsetInMainAxis(const OrderedFlexItemList&, LayoutUnit& availableFreeSpace);
@@ -154,6 +155,7 @@ private:
     void alignFlexLines(Vector<LineContext>&);
     void alignChildren(const Vector<LineContext>&);
     void applyStretchAlignmentToChild(RenderBox*, LayoutUnit lineCrossAxisExtent);
+    void computeAspectRatioOfChild(RenderBox* child, double& aspectRatio);
     void flipForRightToLeftColumn();
     void flipForWrapReverse(const Vector<LineContext>&, LayoutUnit crossAxisStartEdge);