This reverts commit 0a663bf9f1332c2ea92b7b49cdb3716472c29590.
Reason for revert: Breaks isolate tests
Original change's description:
> Add in missing protobuf code.
>
> Turns out the import of histogram_pb2 failed not on the stub itself
> (which I thought for a long, long time), but because of the protobuf
> support code it includes in turn. This is a drawback of catching
> the ImportError in histogram_proto.py.
>
> This has a decent chance of fixing the problem.
>
> Tbr: mbonadei@webrtc.org
> Bug: chromium:1029452
> Change-Id: I3c07a362dcfd174a388b3cc34449c08951cea626
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/171860
> Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#30912}
TBR=phoglund@webrtc.org,mbonadei@webrtc.org
Change-Id: I05bf2f65905afcb7dfdc1e3fca7c01b4af377410
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1029452
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/171866
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Commit-Queue: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30915}
749dff12b5