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

LayoutTests/fast/css-grid-layout/grid-preferred-logical-widths.html

Index: LayoutTests/fast/css-grid-layout/grid-preferred-logical-widths.html
diff --git a/LayoutTests/fast/css-grid-layout/grid-preferred-logical-widths.html b/LayoutTests/fast/css-grid-layout/grid-preferred-logical-widths.html
index eb7e2ea0aa19deff47d907b78b9d3002899abc4f..d7ca62440ff12363855c0fb1ffac1adef393dc5e 100644
--- a/LayoutTests/fast/css-grid-layout/grid-preferred-logical-widths.html
+++ b/LayoutTests/fast/css-grid-layout/grid-preferred-logical-widths.html
@@ -9,37 +9,37 @@
 <link href="../css-intrinsic-dimensions/resources/width-keyword-classes.css" rel=stylesheet>
 <style>
 .gridMinContentFixed {
-    grid-definition-columns: minmax(min-content, 40px) minmax(min-content, 40px);
-    grid-definition-rows: 10px;
+    grid-template-columns: minmax(min-content, 40px) minmax(min-content, 40px);
+    grid-template-rows: 10px;
     font: 10px/1 Ahem;
 }
 
 .gridFixedMinContent {
-    grid-definition-columns: minmax(30px, min-content) minmax(30px, min-content);
-    grid-definition-rows: 10px;
+    grid-template-columns: minmax(30px, min-content) minmax(30px, min-content);
+    grid-template-rows: 10px;
     font: 10px/1 Ahem;
 }
 
 .gridFixedMaxContent {
-    grid-definition-columns: minmax(40px, max-content) minmax(40px, max-content);
-    grid-definition-rows: 10px;
+    grid-template-columns: minmax(40px, max-content) minmax(40px, max-content);
+    grid-template-rows: 10px;
     font: 10px/1 Ahem;
 }
 
 .gridFixedFixed {
-    grid-definition-columns: minmax(30px, 40px) minmax(30px, 40px);
-    grid-definition-rows: 10px;
+    grid-template-columns: minmax(30px, 40px) minmax(30px, 40px);
+    grid-template-rows: 10px;
 }
 
 .gridAutoContent {
-    grid-definition-columns: auto auto;
-    grid-definition-rows: 10px;
+    grid-template-columns: auto auto;
+    grid-template-rows: 10px;
     font: 10px/1 Ahem;
 }
 
 .gridFixedFraction {
-    grid-definition-columns: minmax(10px, 1fr) minmax(2fr, 20px);
-    grid-definition-rows: 10px;
+    grid-template-columns: minmax(10px, 1fr) minmax(2fr, 20px);
+    grid-template-rows: 10px;
 }
 
 .margins {