Wrap ClassLiterals in DoExpressions instead of giving them BlockScopes.

src/full-codegen/full-codegen.h

Index: src/full-codegen/full-codegen.h
diff --git a/src/full-codegen/full-codegen.h b/src/full-codegen/full-codegen.h
index 876ce6c0b977bc74e60aa79ea7533d6a2d781919..cb2edaf157ea4d08de1d6a510522ea4bc57431e8 100644
--- a/src/full-codegen/full-codegen.h
+++ b/src/full-codegen/full-codegen.h
@@ -201,23 +201,6 @@ class FullCodeGenerator final : public AstVisitor<FullCodeGenerator> {
     }
   };
 
-  // A class literal expression
-  class NestedClassLiteral : public NestedStatement {
-   public:
-    NestedClassLiteral(FullCodeGenerator* codegen, ClassLiteral* lit)
-        : NestedStatement(codegen),
-          needs_context_(lit->scope() != nullptr &&
-                         lit->scope()->NeedsContext()) {}
-
-    NestedStatement* Exit(int* context_length) override {
-      if (needs_context_) ++(*context_length);
-      return previous_;
-    }
-
-   private:
-    const bool needs_context_;
-  };
-
   class DeferredCommands {
    public:
     enum Command { kReturn, kThrow, kBreak, kContinue };