Revert of Change most IPC tests to use ChannelMojo. (patchset #1 id:100001 of https://codereview.chromium.org/2451953003/ )

Reason for revert:
IPCChannelBadMessageTest.BadMessage is failing on Ubuntu-12.04.

Original issue's description:
> Change most IPC tests to use ChannelMojo.
>
> Most IPC::Channels in production are now ChannelMojo, but most tests
> use the platform-specific Channel implementations. This changes the IPC
> tests other than IPCMultiSendingFdsTest.StressTest and those in
> ipc_channel_unittest.cc and ipc_channel_posix_unittest.cc to use
> ChannelMojo.
>
> BUG=659448
>
> Committed: https://crrev.com/d45a95a8ac88b71b768a850cbeffc2c318a10cf9
> Cr-Commit-Position: refs/heads/master@{#427624}

[email protected],[email protected]
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=659448

Review-Url: https://codereview.chromium.org/2455583002
Cr-Commit-Position: refs/heads/master@{#427642}
10 files changed