Always give class literals a block scope

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 6ce9269927c645fd16b8f6b431606bcd8101f570..b24db9f40d8c954bfaa610f3e5d0d8ff6b3dbd26 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -1527,20 +1527,15 @@ void AstGraphBuilder::VisitFunctionLiteral(FunctionLiteral* expr) {
 
 
 void AstGraphBuilder::VisitClassLiteral(ClassLiteral* expr) {
-  if (expr->scope() == NULL) {
-    // Visit class literal in the same scope, no declarations.
+  // Visit declarations and class literal in a block scope.
+  if (expr->scope()->ContextLocalCount() > 0) {
+    Node* context = BuildLocalBlockContext(expr->scope());
+    ContextScope scope(this, expr->scope(), context);
+    VisitDeclarations(expr->scope()->declarations());
     VisitClassLiteralContents(expr);
   } else {
-    // Visit declarations and class literal in a block scope.
-    if (expr->scope()->ContextLocalCount() > 0) {
-      Node* context = BuildLocalBlockContext(expr->scope());
-      ContextScope scope(this, expr->scope(), context);
-      VisitDeclarations(expr->scope()->declarations());
-      VisitClassLiteralContents(expr);
-    } else {
-      VisitDeclarations(expr->scope()->declarations());
-      VisitClassLiteralContents(expr);
-    }
+    VisitDeclarations(expr->scope()->declarations());
+    VisitClassLiteralContents(expr);
   }
 }
 
@@ -1638,8 +1633,7 @@ void AstGraphBuilder::VisitClassLiteralContents(ClassLiteral* expr) {
   literal = NewNode(op, literal, proto);
 
   // Assign to class variable.
-  if (expr->scope() != NULL) {
-    DCHECK_NOT_NULL(expr->class_variable_proxy());
+  if (expr->class_variable_proxy() != nullptr) {
     Variable* var = expr->class_variable_proxy()->var();
     FrameStateBeforeAndAfter states(this, BailoutId::None());
     VectorSlotPair feedback = CreateVectorSlotPair(