Ensure that privates are private.

extensions/renderer/utils_native_handler.h

Index: extensions/renderer/utils_native_handler.h
diff --git a/extensions/renderer/utils_native_handler.h b/extensions/renderer/utils_native_handler.h
index c69860f9ade5444195cfd33cf3b5a2d2b41d8919..6a2ae4da350dda98cfb3d1b40337012b606ca446 100644
--- a/extensions/renderer/utils_native_handler.h
+++ b/extensions/renderer/utils_native_handler.h
@@ -17,11 +17,6 @@ class UtilsNativeHandler : public ObjectBackedNativeHandler {
   ~UtilsNativeHandler() override;
 
  private:
-  // |args| consists of two arguments: a public class name, and a reference
-  // to the implementation class. CreateClassWrapper returns a new class
-  // that wraps the implementation, while hiding its members.
-  void CreateClassWrapper(const v8::FunctionCallbackInfo<v8::Value>& args);
-
   // |args| consists of one argument: an arbitrary value. Returns a deep copy of
   // that value. The copy will have no references to nested values of the
   // argument.