Update functions.dart

[rosera]

Issue:

Backend service unable to build due to invalid signature. Error indicates the RequestContext is not supported based on the updated api specification.

@CloudFunction()
GreetingResponse function(GreetingRequest request, RequestContext context) {
  final name = request.name ?? 'World';
  final response =
      GreetingResponse(salutation: _randomSalutation(), name: name);
  context.logger.info('greetingResponse: ${response.toJson()}');
  return response;
}

Resolution:

Resolve invalid function signature entry for backend Dart Function Frameworks example. Specifically the reference to

• RequestContext context
• context.logger.info

@CloudFunction()
GreetingResponse function(GreetingRequest request) {
  final name = request.name ?? 'World';
  final response =
      GreetingResponse(salutation: _randomSalutation(), name: name);
  return response;
}

[kevmoo]

Closing out in favor of #464 – investigating now!