Add vector<uint8_t> to Base64 decoded data types.

This is a prerequisite to decode fmtp sprop-parameter-sets into
the right encoding for H264SpsPpsTracker.

# Legal requires us to keep the original license header.
NOPRESUBMIT=true
BUG=webrtc:5948

Review-Url: https://codereview.webrtc.org/2539153002
Cr-Original-Commit-Position: refs/heads/master@{#15604}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 8fc0c4c32ff6ba1dc0939c5ea34bc56e5b21cbc9
2 files changed