[css-grid] "normal" alignment is "start" for replaced elements

third_party/WebKit/LayoutTests/fast/css-grid-layout/resources/grid-alignment.css

 /* align-self */
 .alignSelfAuto { align-self: auto; }
 .alignSelfStretch { align-self: stretch; }
 .alignSelfStart { align-self: start; }
 .alignSelfEnd { align-self: end; }
 .alignSelfCenter { align-self: center; }
 .alignSelfRight { align-self: right; }
 .alignSelfLeft { align-self: left; }
 
 .alignSelfFlexStart { align-self: flex-start; }
@@ skipping 75 matching lines @@
 .justifyContentLeft { justify-content: left; }
 .justifyContentRight { justify-content: right; }
 .justifyContentFlexStart { justify-content: flex-start; }
 .justifyContentFlexEnd { justify-content: flex-end; }
 .justifyContentSpaceBetween { justify-content: space-between; }
 .justifyContentSpaceAround { justify-content: space-around; }
 .justifyContentSpaceEvenly { justify-content: space-evenly; }
 .justifyContentStretch { justify-content: stretch; }
 
 /* Both align-items and justify-items */
+.itemsNormal {
+    align-items: normal;
+    justify-items: normal;
+}
+
+.itemsStretch {
+    align-items: stretch;
+    justify-items: stretch;
+}
+
 .itemsStart {
     align-items: start;
     justify-items: start;
 }
 
 .itemsCenter {
     align-items: center;
     justify-items: center;
 }
 
@@ skipping 106 matching lines @@
 
 .contentSpaceEvenly {
     justify-content: space-evenly;
     align-content: space-evenly;
 }
 
 .contentStretch {
     justify-content: stretch;
     align-content: stretch;
 }