Initial switch to Chromium-style CHECK_* and DCHECK_* macros.

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index dedc45aae71f75353c242d6e69b5996a1474b215..c1c0354d299deadedc4d3be11f82751ad8a3dc05 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -604,14 +604,14 @@ class ParserTraits {
     int position() const { return pos_; }
 
     void AddTemplateSpan(Literal* cooked, Literal* raw, int end, Zone* zone) {
-      DCHECK_NOT_NULL(cooked);
-      DCHECK_NOT_NULL(raw);
+      DCHECK(cooked);
+      DCHECK(raw);
       cooked_.Add(cooked, zone);
       raw_.Add(raw, zone);
     }
 
     void AddExpression(Expression* expression, Zone* zone) {
-      DCHECK_NOT_NULL(expression);
+      DCHECK(expression);
       expressions_.Add(expression, zone);
     }