got member read accessors, got Parse function. BUG=webrtc:5260 R=åsapersson Review URL: https://codereview.webrtc.org/1552773002 Cr-Commit-Position: refs/heads/master@{#11324}
Cleaning/Parsing will be done in the https://codereview.webrtc.org/1552773002/ BUG=webrtc:5260 R=asapersson@webrtc.org, åsapersson Review URL: https://codereview.webrtc.org/1590883002 . Cr-Commit-Position: refs/heads/master@{#11268}