Revert of Remove usage of deprecated g_type_init API (patchset #1 id:1 of https://codereview.webrtc.org/2660823003/ )
Revert of Remove usage of deprecated g_type_init API (patchset #1 id:1 of https://codereview.webrtc.org/2660823003/ )

Reason for revert:
Reverting due to internal breakage. Will investigate and re-land

Original issue's description:
> Remove usage of deprecated g_type_init API
>
> BUG=webrtc:7024
>
> Review-Url: https://codereview.webrtc.org/2660823003
> Cr-Commit-Position: refs/heads/master@{#16376}
> Committed: https://chromium.googlesource.com/external/webrtc/+/b2caab7f6078ed46d4bda5103d7f8c93b896a518

TBR=kjellander@webrtc.org,perkj@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7024

Review-Url: https://codereview.webrtc.org/2666103002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#16379}

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