Merge "Removes redundant RefBase inheritance."

// writing the report to dropbox. MetricProducers should respond to package changes as required in

// PackageInfoListener, but if none of the metrics are slicing by package name, then the update can

// be a no-op.

class MetricProducer : public virtual RefBase, public virtual PackageInfoListener {

class MetricProducer : public virtual PackageInfoListener {

public:

    virtual ~MetricProducer(){};