Revert of Revert of Re-enable ChannelMojo (patchset #1 id:1 of...

Revert of Revert of Re-enable ChannelMojo (patchset #1 id:1 of https://codereview.chromium.org/1029263008/)

Reason for revert:
It seems it was not guilty.
According to Android Tests (dbg) bot, revering #322094 was enough.

Original issue's description:
> Revert of Re-enable ChannelMojo (patchset #1 id:1 of https://codereview.chromium.org/1021393002/)
>
> Reason for revert:
> speculative revert for "Too many open files" on various Mac bots.
> e.g. http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac10.9/builds/17511/steps/webkit_tests/logs/stdio
>
> Original issue's description:
> > Re-enable ChannelMojo
> >
> > It was disabled due to crbug.com/466814 that is now fixed.
> > It's time to turn it on again.
> >
> > R=viettrungluu@chromium.org
> > BUG=466814,377980
> >
> > Committed: https://crrev.com/c99c93842fa50f85888d069f0be962462f92a643
> > Cr-Commit-Position: refs/heads/master@{#322092}
>
> TBR=viettrungluu@chromium.org,morrita@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=466814,377980
>
> Committed: https://crrev.com/9e4596122cda5dbc959895b53679e14df45658b5
> Cr-Commit-Position: refs/heads/master@{#322113}

TBR=viettrungluu@chromium.org,morrita@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=466814,377980

Review URL: https://codereview.chromium.org/1031083002

Cr-Commit-Position: refs/heads/master@{#322118}

ipc/mojo/ipc_channel_mojo.cc

@@ -192,8 +192,7 @@ void ChannelMojo::ChannelInfoDeleter::operator()(
 // static
 bool ChannelMojo::ShouldBeUsed() {
   // TODO(morrita): Remove this if it sticks.
-  // ChannelMojo is currently disabled due to http://crbug.com/466814.
-  return false;
+  return true;
 }
 
 // static