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

Source/core/css/parser/BisonCSSParser-in.cpp

Index: Source/core/css/parser/BisonCSSParser-in.cpp
diff --git a/Source/core/css/parser/BisonCSSParser-in.cpp b/Source/core/css/parser/BisonCSSParser-in.cpp
index ae1be585ec9f05899ea66538487b9da0b0f769db..e11ca0846f996482c7dc807e963f2bab7c2929eb 100644
--- a/Source/core/css/parser/BisonCSSParser-in.cpp
+++ b/Source/core/css/parser/BisonCSSParser-in.cpp
@@ -2456,8 +2456,8 @@ bool BisonCSSParser::parseValue(CSSPropertyID propId, bool important)
         parsedValue = parseGridTrackSize(*m_valueList);
         break;
 
-    case CSSPropertyGridDefinitionColumns:
-    case CSSPropertyGridDefinitionRows:
+    case CSSPropertyGridTemplateColumns:
+    case CSSPropertyGridTemplateRows:
         if (!RuntimeEnabledFeatures::cssGridLayoutEnabled())
             return false;
         return parseGridTrackList(propId, important);