[CSS Grid Layout] Rename grid-{rows|columns} to grid-definition-{rows|columns}

LayoutTests/fast/css-grid-layout/flex-content-resolution-rows.html

Index: LayoutTests/fast/css-grid-layout/flex-content-resolution-rows.html
diff --git a/LayoutTests/fast/css-grid-layout/flex-content-resolution-rows.html b/LayoutTests/fast/css-grid-layout/flex-content-resolution-rows.html
index 152d7985c6313f984785044cbf7d7665902c4bb8..58e8433c60d3bd7980c60916349d07c4c2c50d74 100644
--- a/LayoutTests/fast/css-grid-layout/flex-content-resolution-rows.html
+++ b/LayoutTests/fast/css-grid-layout/flex-content-resolution-rows.html
@@ -7,20 +7,20 @@ if (window.testRunner)
 <link href="resources/grid.css" rel="stylesheet">
 <style>
 .gridMinFlexContent {
-    grid-columns: 50px;
-    grid-rows: minmax(1fr, 50px);
+    grid-definition-columns: 50px;
+    grid-definition-rows: minmax(1fr, 50px);
 }
 .gridMaxFlexContent {
-    grid-columns: 50px;
-    grid-rows: minmax(30px, 2fr);
+    grid-definition-columns: 50px;
+    grid-definition-rows: minmax(30px, 2fr);
 }
 .gridTwoMaxFlexContent {
-    grid-columns: 50px;
-    grid-rows: minmax(10px, 1fr) minmax(10px, 2fr);
+    grid-definition-columns: 50px;
+    grid-definition-rows: minmax(10px, 1fr) minmax(10px, 2fr);
 }
 .gridTwoDoubleMaxFlexContent {
-    grid-columns: 50px;
-    grid-rows: minmax(10px, 0.5fr) minmax(10px, 2fr);
+    grid-definition-columns: 50px;
+    grid-definition-rows: minmax(10px, 0.5fr) minmax(10px, 2fr);
 }
 </style>
 <script src="../../resources/check-layout.js"></script>