yujo ba13131f9a Trivial data() and mutable_data() implementations
This will allow migrating existing references to data_ over to data() and
mutable_data(), so that https://codereview.webrtc.org/2750783004/ can be
imported cleanly.

BUG=webrtc:7343
TBR=henrika@webrtc.org

Review-Url: https://codereview.webrtc.org/2795103002
Cr-Commit-Position: refs/heads/master@{#17532}
2017-04-04 20:40:59 +00:00
..