This was done by
* adding an EchoMetric class to EvaluationScore
* passing an echo metric binary path from the cmd arguments to the
EvaluationScoreWorkerFactory
* passing the render input filepath to the Evaluator.
The echo score is supposed to be computed by the provided binary. It
should print the echo score in [0.0, 1.0] to a text file. It should
satisfy the cmd flags in its invocation in EchoMetric._Run()
Bug: webrtc:7494
Change-Id: I397013d6ed17659ea01d0623d98a14d4fcdcc161
Reviewed-on: https://webrtc-review.googlesource.com/97022
Commit-Queue: Alex Loiko <aleloi@webrtc.org>
Reviewed-by: Alessio Bazzica <alessiob@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24537}