Returns the current network route with transport overhead. TODO(zhihuang): Make it pure virtual once the Chrome/remoting is updated.

webrtc::VideoFrame next_frame() override { i = (i + 1) % frames_.size(); return frames_[i].frame; }

Documented in json11.hpp

parse_number() * * Parse a double. */

parse_string() * * Parse a string, starting at the current position. */