Revert of Bailing out if pc factory fails to get created. (patchset #1 id:1 of https://codereview.webrtc.org/1339923004/ )
Revert of Bailing out if pc factory fails to get created. (patchset #1 id:1 of https://codereview.webrtc.org/1339923004/ )

Reason for revert:
Breaks goma (??!??!?)

Original issue's description:
> Bailing out if pc factory fails to get created.
>
> This prevents us from continuing if we fail initialization.
> The failure will happen closer to its source, rather than
> when we try to create the first peer connection.
>
> BUG=None
> R=glaznev@webrtc.org
>
> Committed: https://crrev.com/6eb75d9e67f02c256436eb96f3c77026486561a1
> Cr-Commit-Position: refs/heads/master@{#9948}

TBR=glaznev@webrtc.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=None

Review URL: https://codereview.webrtc.org/1344363002

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#9949}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 01ddf01d9c787601064a28a01ce60476aeeaa9d0

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