[CSS Grid Layout] Rename grid-definition-{columns|rows} to match the new syntax

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 ad5619a926f9a1456f56381c3eed6b7aeda6f683..b38bd7a75aaf572d90c9b5390eac33194b085a58 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-definition-columns: 50px;
-    grid-definition-rows: minmax(1fr, 50px);
+    grid-template-columns: 50px;
+    grid-template-rows: minmax(1fr, 50px);
 }
 .gridMaxFlexContent {
-    grid-definition-columns: 50px;
-    grid-definition-rows: minmax(30px, 2fr);
+    grid-template-columns: 50px;
+    grid-template-rows: minmax(30px, 2fr);
 }
 .gridTwoMaxFlexContent {
-    grid-definition-columns: 50px;
-    grid-definition-rows: minmax(10px, 1fr) minmax(10px, 2fr);
+    grid-template-columns: 50px;
+    grid-template-rows: minmax(10px, 1fr) minmax(10px, 2fr);
 }
 .gridTwoDoubleMaxFlexContent {
-    grid-definition-columns: 50px;
-    grid-definition-rows: minmax(10px, 0.5fr) minmax(10px, 2fr);
+    grid-template-columns: 50px;
+    grid-template-rows: minmax(10px, 0.5fr) minmax(10px, 2fr);
 }
 </style>
 <script src="../../resources/check-layout.js"></script>