Replace ENABLE(ASSERT) with DCHECK_IS_ON().

third_party/WebKit/Source/core/style/GridArea.h

Index: third_party/WebKit/Source/core/style/GridArea.h
diff --git a/third_party/WebKit/Source/core/style/GridArea.h b/third_party/WebKit/Source/core/style/GridArea.h
index 538bd0fe772957317001d9a696c67fc07046f98d..bbc1f97e57d89bb04da373b70280ae5e35d26e6a 100644
--- a/third_party/WebKit/Source/core/style/GridArea.h
+++ b/third_party/WebKit/Source/core/style/GridArea.h
@@ -133,7 +133,7 @@ struct GridSpan {
   enum GridSpanType { UntranslatedDefinite, TranslatedDefinite, Indefinite };
 
   GridSpan(int startLine, int endLine, GridSpanType type) : m_type(type) {
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
     ASSERT(startLine < endLine);
     if (type == TranslatedDefinite) {
       ASSERT(startLine >= 0);