Revert of Re-enable ChannelMojo (patchset #1 id:20001 of https://codereview.chromium.org/1262503011/ )

Reason for revert:
Suspecting this CL causes many Layout test failures (https://crbug.com/517391).

Original issue's description:
> Re-enable ChannelMojo
>
> The performance regression seen previously was probably
> misattributed to ChannelMojo. Also, given that a great deal of
> code will now take advantage of the channel's thread-safe Send,
> this is expected to result in an net performance improvement.
>
> BUG=500019
> TBR=jam@chromium.org
>
> Committed: https://crrev.com/ab1a53c964a77dabb6d08b7199111b51a330885e
> Cr-Commit-Position: refs/heads/master@{#342055}

TBR=rockot@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=500019

Review URL: https://codereview.chromium.org/1265383006

Cr-Commit-Position: refs/heads/master@{#342085}


CrOS-Libchrome-Original-Commit: a116e2287895078d72b2766ab1ac44582b27a7c6
1 file changed
tree: 493c9b5af2b3b56dd32c2e98f159e89f085cb375
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/