Revert of Wrap ClassLiterals in DoExpressions instead of giving them BlockScopes.

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index 5fb120def80393b05a29466908ad279c33e77b1f..b1187a2789cf25ba683ed5505e7a61e202b5d0a7 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -1361,6 +1361,18 @@
 }
 
 void BytecodeGenerator::VisitClassLiteral(ClassLiteral* expr) {
+  if (expr->scope()->ContextLocalCount() > 0) {
+    VisitNewLocalBlockContext(expr->scope());
+    ContextScope scope(this, expr->scope());
+    VisitDeclarations(expr->scope()->declarations());
+    VisitClassLiteralContents(expr);
+  } else {
+    VisitDeclarations(expr->scope()->declarations());
+    VisitClassLiteralContents(expr);
+  }
+}
+
+void BytecodeGenerator::VisitClassLiteralContents(ClassLiteral* expr) {
   VisitClassLiteralForRuntimeDefinition(expr);
 
   // Load the "prototype" from the constructor.