Implement 'grid-template' parsing

Source/core/css/resolver/StyleBuilderCustom.cpp

Index: Source/core/css/resolver/StyleBuilderCustom.cpp
diff --git a/Source/core/css/resolver/StyleBuilderCustom.cpp b/Source/core/css/resolver/StyleBuilderCustom.cpp
index a1de9287ea802c49371993a4c66182bbba3f6d18..3b00e9fd76819c9e34dca51c8829c231d7da35a8 100644
--- a/Source/core/css/resolver/StyleBuilderCustom.cpp
+++ b/Source/core/css/resolver/StyleBuilderCustom.cpp
@@ -47,6 +47,7 @@
 #include "core/css/CSSAspectRatioValue.h"
 #include "core/css/CSSCursorImageValue.h"
 #include "core/css/CSSGradientValue.h"
+#include "core/css/CSSGridTemplateValue.h"
 #include "core/css/CSSImageSetValue.h"
 #include "core/css/CSSLineBoxContainValue.h"
 #include "core/css/CSSPrimitiveValueMappings.h"
@@ -1588,6 +1589,32 @@ void StyleBuilder::oldApplyProperty(CSSPropertyID id, StyleResolver* styleResolv
         return;
     }
 
+    case CSSPropertyGridTemplate: {
+        if (isInherit) {
+            state.style()->setNamedGridArea(state.parentStyle()->namedGridArea());
+            state.style()->setNamedGridAreaRowCount(state.parentStyle()->namedGridAreaRowCount());
+            state.style()->setNamedGridAreaColumnCount(state.parentStyle()->namedGridAreaColumnCount());
+            return;
+        }
+        if (isInitial) {
+            state.style()->setNamedGridArea(RenderStyle::initialNamedGridArea());
+            state.style()->setNamedGridAreaRowCount(RenderStyle::initialNamedGridAreaCount());
+            state.style()->setNamedGridAreaColumnCount(RenderStyle::initialNamedGridAreaCount());
+            return;
+        }
+
+        if (value->isPrimitiveValue()) {
+            ASSERT(toCSSPrimitiveValue(value)->getValueID() == CSSValueNone);
+            return;
+        }
+
+        CSSGridTemplateValue* gridTemplateValue = toCSSGridTemplateValue(value);
+        state.style()->setNamedGridArea(gridTemplateValue->gridAreaMap());
+        state.style()->setNamedGridAreaRowCount(gridTemplateValue->rowCount());
+        state.style()->setNamedGridAreaColumnCount(gridTemplateValue->columnCount());
+        return;
+    }
+
     // These properties are aliased and we already applied the property on the prefixed version.
     case CSSPropertyTransitionDelay:
     case CSSPropertyTransitionDuration: