uses standard types instead of RTCPUtility type to store data.
got member read accessors, got Parse function.

BUG=webrtc:5260
R=åsapersson

Review URL: https://codereview.webrtc.org/1552773002

Cr-Original-Commit-Position: refs/heads/master@{#11324}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: d8dccd57ea39ef7ce5f2fcb9b133be33fe1c6687
3 files changed