Revert of Split protoc into library and executable.

Revert of Split protoc into library and executable. (patchset #4 id:60001 of https://codereview.chromium.org/1923733002/ )

Reason for revert:
Broke compile on WebKit Linux MSAN (and others?)

Original issue's description:
> Split protoc into library and executable.
>
> Similarly to the upstream BUILD file, we split the protoc compiler into
> a library and executable. The purpose is to allow protoc compiler
> plugins (see plugin.h).
>
> BUG=597321
TBR=pkasting@chromium.org,xyzzyz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=597321
Committed: https://crrev.com/a4d56705f4c988bf48ec2c4856f2b07a9a23ad1f
Cr-Commit-Position: refs/heads/master@{#390486}

[Justin Donnelly, 2016-04-28 21:31:43]

Created Revert of Split protoc into library and executable.

[commit-bot: I haz the power, 2016-04-28 21:32:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1929963004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1929963004/1

[commit-bot: I haz the power, 2016-04-28 21:32:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-30 17:21:32]

Patchset 1 (id:??) landed as
https://crrev.com/a4d56705f4c988bf48ec2c4856f2b07a9a23ad1f
Cr-Commit-Position: refs/heads/master@{#390486}

[commit-bot: I haz the power, 2016-04-30 17:57:37]

Description was changed from

==========
Revert of Split protoc into library and executable. (patchset #4 id:60001 of
https://codereview.chromium.org/1923733002/ )

Reason for revert:
Broke compile on WebKit Linux MSAN (and others?)

Original issue's description:
> Split protoc into library and executable.
> 
> Similarly to the upstream BUILD file, we split the protoc compiler into
> a library and executable. The purpose is to allow protoc compiler
> plugins (see plugin.h).
> 
> BUG=597321

TBR=pkasting@chromium.org,xyzzyz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=597321
==========

to

==========
Revert of Split protoc into library and executable. (patchset #4 id:60001 of
https://codereview.chromium.org/1923733002/ )

Reason for revert:
Broke compile on WebKit Linux MSAN (and others?)

Original issue's description:
> Split protoc into library and executable.
>
> Similarly to the upstream BUILD file, we split the protoc compiler into
> a library and executable. The purpose is to allow protoc compiler
> plugins (see plugin.h).
>
> BUG=597321

TBR=pkasting@chromium.org,xyzzyz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=597321

Committed: https://crrev.com/a4d56705f4c988bf48ec2c4856f2b07a9a23ad1f
Cr-Commit-Position: refs/heads/master@{#390486}
==========