Revert of Revert renderer IPC::Channel acquisition via shell connection

Revert of Revert renderer IPC::Channel acquisition via shell connection (patchset #2 id:20001 of https://codereview.chromium.org/2238633003/ )

Reason for revert:
Essentially relanding the new bootstrap behavior since it apparently wasn't the cause of breakage.

Original issue's description:
> Revert renderer IPC::Channel acquisition via shell connection
>
> This may be causing failures in some test environments. Reverting
> for now until there's more time to investigate.
>
> This CL effectively reverts a subset of
> ff1b853cb6bfc3d5402fc970b2d856cbe73418cc.
>
> BUG=636624
> TBR=ben@chromium.org
>
> Committed: https://crrev.com/fd446c5a79522af111bb141559132893d85b60f8
> Cr-Commit-Position: refs/heads/master@{#411234}

TBR=ben@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=636624
Committed: https://crrev.com/04c007563350a80e8c64bb9b23b24f7bcb3dab10
Cr-Commit-Position: refs/heads/master@{#411371}

[Ken Rockot(use gerrit already), 2016-08-11 17:53:28]

The CQ bit was checked by rockot@chromium.org

[Ken Rockot(use gerrit already), 2016-08-11 17:53:29]

Created Revert of Revert renderer IPC::Channel acquisition via shell connection

[commit-bot: I haz the power, 2016-08-11 17:54:03]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-11 17:54:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-11 17:57:45]

Description was changed from

==========
Revert of Revert renderer IPC::Channel acquisition via shell connection
(patchset #2 id:20001 of https://codereview.chromium.org/2238633003/ )

Reason for revert:
Essentially relanding the new bootstrap behavior since it apparently wasn't the
cause of breakage.

Original issue's description:
> Revert renderer IPC::Channel acquisition via shell connection
> 
> This may be causing failures in some test environments. Reverting
> for now until there's more time to investigate.
> 
> This CL effectively reverts a subset of
> ff1b853cb6bfc3d5402fc970b2d856cbe73418cc.
> 
> BUG=636624
> TBR=ben@chromium.org
> 
> Committed: https://crrev.com/fd446c5a79522af111bb141559132893d85b60f8
> Cr-Commit-Position: refs/heads/master@{#411234}

TBR=ben@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=636624
==========

to

==========
Revert of Revert renderer IPC::Channel acquisition via shell connection
(patchset #2 id:20001 of https://codereview.chromium.org/2238633003/ )

Reason for revert:
Essentially relanding the new bootstrap behavior since it apparently wasn't the
cause of breakage.

Original issue's description:
> Revert renderer IPC::Channel acquisition via shell connection
>
> This may be causing failures in some test environments. Reverting
> for now until there's more time to investigate.
>
> This CL effectively reverts a subset of
> ff1b853cb6bfc3d5402fc970b2d856cbe73418cc.
>
> BUG=636624
> TBR=ben@chromium.org
>
> Committed: https://crrev.com/fd446c5a79522af111bb141559132893d85b60f8
> Cr-Commit-Position: refs/heads/master@{#411234}

TBR=ben@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=636624

Committed: https://crrev.com/04c007563350a80e8c64bb9b23b24f7bcb3dab10
Cr-Commit-Position: refs/heads/master@{#411371}
==========

[commit-bot: I haz the power, 2016-08-11 17:57:46]

Patchset 1 (id:??) landed as
https://crrev.com/04c007563350a80e8c64bb9b23b24f7bcb3dab10
Cr-Commit-Position: refs/heads/master@{#411371}