[CSS Grid Layout] Adapting align-self, align-items and justify-self to the last CSS 3 spec.

Source/core/css/resolver/StyleAdjuster.cpp

Index: Source/core/css/resolver/StyleAdjuster.cpp
diff --git a/Source/core/css/resolver/StyleAdjuster.cpp b/Source/core/css/resolver/StyleAdjuster.cpp
index 5d7c1aa7b235643035d2c71cb92d93279de623bd..a9960fb6d2f0b6af33670aee43b218135e34acfd 100644
--- a/Source/core/css/resolver/StyleAdjuster.cpp
+++ b/Source/core/css/resolver/StyleAdjuster.cpp
@@ -254,6 +254,23 @@ void StyleAdjuster::adjustRenderStyle(RenderStyle* style, RenderStyle* parentSty
         style->setTextAutosizingMultiplier(e->renderStyle()->textAutosizingMultiplier());
         style->setUnique();
     }
+
+    adjustStyleForAlignment(style, *parentStyle);
+}
+
+void StyleAdjuster::adjustStyleForAlignment(RenderStyle* style, RenderStyle& parentStyle)
+{
+    if (style->justifyItems() == ItemPositionAuto)
+        style->resolveJustifyItemsAuto(parentStyle);
+
+    if (style->justifySelf() == ItemPositionAuto)
+        style->resolveJustifySelfAuto(parentStyle);
+
+    if (style->alignItems() == ItemPositionAuto)
+        style->resolveAlignItemsAuto(parentStyle);
+
+    if (style->alignSelf() == ItemPositionAuto)
+        style->resolveAlignSelfAuto(parentStyle);
 }
 
 void StyleAdjuster::adjustStyleForTagName(RenderStyle* style, RenderStyle* parentStyle, Element& element)