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

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index 7b62443ca1ecd0a59a450abef8371450bbd07683..8d4c31088301473a64abf8e3af7028345c64772a 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -948,7 +948,7 @@ void AstGraphBuilder::VisitClassLiteralContents(ClassLiteral* expr) {
 
   // Assign to class variable.
   if (expr->scope() != NULL) {
-    DCHECK_NOT_NULL(expr->class_variable_proxy());
+    DCHECK(expr->class_variable_proxy());
     Variable* var = expr->class_variable_proxy()->var();
     BuildVariableAssignment(var, literal, Token::INIT_CONST, BailoutId::None());
   }