[css-align] New CSS Value 'normal' for Self Alignment

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

Index: third_party/WebKit/Source/core/layout/LayoutBox.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.h b/third_party/WebKit/Source/core/layout/LayoutBox.h
index 0f80c7e9498b1e19096a1d7080dddfc6ee8cda7d..2207695b158634c5e9c8ca827277d6875c27452f 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.h
@@ -968,6 +968,8 @@ protected:
     void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
     void updateFromStyle() override;
 
+    virtual ItemPosition selfAlignmentNormalBehavior() const { return ItemPositionStretch; }
+
     // Returns false if it could not cheaply compute the extent (e.g. fixed background), in which case the returned rect may be incorrect.
     // FIXME: make this a const method once the LayoutBox reference in BoxPainter is const.
     bool getBackgroundPaintedExtent(LayoutRect&) const;
@@ -996,6 +998,8 @@ protected:
     PaintInvalidationReason invalidatePaintIfNeeded(const PaintInvalidationState&) override;
     void invalidatePaintOfSubtreesIfNeeded(const PaintInvalidationState& childPaintInvalidationState) override;
 
+    bool columnFlexItemHasStretchAlignment() const;
+    bool isStretchingColumnFlexItem() const;
     bool hasStretchedLogicalWidth() const;
 
     bool hasNonCompositedScrollbars() const final;