Revert of Move content's shell connections to the IO thread

Revert of Move content's shell connections to the IO thread (patchset #9 id:220001 of https://codereview.chromium.org/2111353002/ )

Reason for revert:
stupid build failure

Original issue's description:
> Move content's shell connections to the IO thread
>
> Moves all shell connections in the content layer
> (connections owned by instances of MojoShellConnection and
> MojoChildConnection) to the IO thread in all process types.
> Note that instances of MojoShellConnection and
> MojoChildConnection may still be created and used on
> any thread.
>
> Additionally exposes a way for InterfaceRegistry and
> InterfaceProvider to forward to/from other instances
> so we can still have a corresponding instance of each
> on whatever thread owns the Mojo[Shell/Child]Connection
> object.
>
> This simplifies interface registration and acquisition
> on process hosts and ChildThreadImpls, and makes it possible
> for a future CL to introduce IO-thread service registration
> to avoid thread hops when binding incoming interface requests.
>
> BUG=623398, 612500
>
> Committed: https://crrev.com/439768f0aaaea83ffb7ce6c3ba4438804582c383
> Cr-Commit-Position: refs/heads/master@{#404228}

TBR=ben@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=623398, 612500
Committed: https://crrev.com/4a93a86045c9ed89385d13a6f6d154fadd2beaab
Cr-Commit-Position: refs/heads/master@{#404236}

[Ken Rockot(use gerrit already), 2016-07-07 20:47:56]

The CQ bit was checked by rockot@chromium.org

[Ken Rockot(use gerrit already), 2016-07-07 20:47:57]

Created Revert of Move content's shell connections to the IO thread

[commit-bot: I haz the power, 2016-07-07 20:48:52]

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, 2016-07-07 20:51:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-07 20:51:30]

CQ bit was unchecked.

[commit-bot: I haz the power, 2016-07-07 20:54:02]

Description was changed from

==========
Revert of Move content's shell connections to the IO thread (patchset #9
id:220001 of https://codereview.chromium.org/2111353002/ )

Reason for revert:
stupid build failure

Original issue's description:
> Move content's shell connections to the IO thread
> 
> Moves all shell connections in the content layer
> (connections owned by instances of MojoShellConnection and
> MojoChildConnection) to the IO thread in all process types.
> Note that instances of MojoShellConnection and
> MojoChildConnection may still be created and used on
> any thread.
> 
> Additionally exposes a way for InterfaceRegistry and
> InterfaceProvider to forward to/from other instances
> so we can still have a corresponding instance of each
> on whatever thread owns the Mojo[Shell/Child]Connection
> object.
> 
> This simplifies interface registration and acquisition
> on process hosts and ChildThreadImpls, and makes it possible
> for a future CL to introduce IO-thread service registration
> to avoid thread hops when binding incoming interface requests.
> 
> BUG=623398,612500
> 
> Committed: https://crrev.com/439768f0aaaea83ffb7ce6c3ba4438804582c383
> Cr-Commit-Position: refs/heads/master@{#404228}

TBR=ben@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=623398,612500
==========

to

==========
Revert of Move content's shell connections to the IO thread (patchset #9
id:220001 of https://codereview.chromium.org/2111353002/ )

Reason for revert:
stupid build failure

Original issue's description:
> Move content's shell connections to the IO thread
>
> Moves all shell connections in the content layer
> (connections owned by instances of MojoShellConnection and
> MojoChildConnection) to the IO thread in all process types.
> Note that instances of MojoShellConnection and
> MojoChildConnection may still be created and used on
> any thread.
>
> Additionally exposes a way for InterfaceRegistry and
> InterfaceProvider to forward to/from other instances
> so we can still have a corresponding instance of each
> on whatever thread owns the Mojo[Shell/Child]Connection
> object.
>
> This simplifies interface registration and acquisition
> on process hosts and ChildThreadImpls, and makes it possible
> for a future CL to introduce IO-thread service registration
> to avoid thread hops when binding incoming interface requests.
>
> BUG=623398,612500
>
> Committed: https://crrev.com/439768f0aaaea83ffb7ce6c3ba4438804582c383
> Cr-Commit-Position: refs/heads/master@{#404228}

TBR=ben@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=623398,612500

Committed: https://crrev.com/4a93a86045c9ed89385d13a6f6d154fadd2beaab
Cr-Commit-Position: refs/heads/master@{#404236}
==========

[commit-bot: I haz the power, 2016-07-07 20:54:03]

Patchset 1 (id:??) landed as
https://crrev.com/4a93a86045c9ed89385d13a6f6d154fadd2beaab
Cr-Commit-Position: refs/heads/master@{#404236}