Revert 3977 BUG=webrtc:1749
Revert 3977
BUG=webrtc:1749

> Update protoc.gypi to match Chromium's latest.
> 
> This is in preparation for enabling protobufs in Chromium. Requires
> syncing tools/protoc_wrapper.
> 
> BUG=webrtc:830
> R=kjellander@webrtc.org
> 
> Review URL: https://webrtc-codereview.appspot.com/1426004

TBR=andrew@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/1453005

git-svn-id: 03ae4fbe531b1eefc9d815f31e49022782c42458@4001 4adac7df-926f-26a2-2b94-8c16560cd09d

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