[CSS Grid Layout] Implement auto-margins alignment of grid items

LayoutTests/fast/css-grid-layout/grid-item-auto-margins-alignment-vertical-lr-expected.txt

Index: LayoutTests/fast/css-grid-layout/grid-item-auto-margins-alignment-vertical-lr-expected.txt
diff --git a/LayoutTests/fast/css-grid-layout/grid-item-auto-margins-alignment-vertical-lr-expected.txt b/LayoutTests/fast/css-grid-layout/grid-item-auto-margins-alignment-vertical-lr-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..11f5eaa2b5991ce8c11f4d7d3b9b3cfe4baa61f2
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+++ b/LayoutTests/fast/css-grid-layout/grid-item-auto-margins-alignment-vertical-lr-expected.txt
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+This test checks that aling-self and justify-self properties are not applied when there is auto-margin in the correponding axis. Instead, auto-margin alignment should be applied.
+
+Direction: LTR | Self Aligmment: center | fixed size items | 1 auto-margin
+
+PASS
+Direction: LTR | Self Aligmment: start | fixed size items | 4 auto-margin
+
+PASS
+Direction: LTR | Self Aligmment: center | auto size items | 1 auto-margin
+
+PASS
+Direction: LTR | Self Aligmment: start | auto size items | 4 auto-margin
+
+PASS
+Direction: RTL | Self Aligmment: center | fixed size items | 1 auto-margin
+
+PASS
+Direction: RTL | Self Aligmment: start | fixed size items | 4 auto-margin
+
+PASS
+Direction: RTL | Self Aligmment: center | auto size items | 1 auto-margin
+
+PASS
+Direction: RTL | Self Aligmment: start | auto size items | 4 auto-margin
+
+PASS