Revert of 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 cb2edaf157ea4d08de1d6a510522ea4bc57431e8..876ce6c0b977bc74e60aa79ea7533d6a2d781919 100644
--- a/src/full-codegen/full-codegen.h
+++ b/src/full-codegen/full-codegen.h
@@ -199,6 +199,23 @@
       }
       return previous_;
     }
+  };
+
+  // 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 {