Remove IPC::Channel::TakePipeHandle()

Remove IPC::Channel::TakePipeHandle()

It doesn't work, and it is no longer used.

BUG=416208
R=cpu@chromium.org, jam@chromium.org

Committed: https://crrev.com/cfdd7ba3cf8658df5a5484b716a1dc48ce3e0674
Cr-Commit-Position: refs/heads/master@{#296820}

[Hajime Morrita, 2014-09-23 22:40:52]

Fixed Nacl build error

[Hajime Morrita, 2014-09-24 19:47:43]

Carlos: Ping. This is just a removal of an unused, dangerous function.
All bots are green.

[Hajime Morrita, 2014-09-25 22:21:42]

cpu: Ping? pure removal.

[darin (slow to review), 2014-09-25 22:46:29]

darin@chromium.org changed reviewers:
+ darin@chromium.org

[darin (slow to review), 2014-09-25 22:46:29]

I love pure code removals.

LGTM!

[cpu_(ooo_6.6-7.5), 2014-09-25 23:00:42]

thanks for doing this!

lgtm

[cpu_(ooo_6.6-7.5), 2014-09-25 23:05:27]

The CQ bit was checked by cpu@chromium.org

[commit-bot: I haz the power, 2014-09-25 23:06:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/601563002/20001

[commit-bot: I haz the power, 2014-09-25 23:12:25]

Committed patchset #2 (id:20001) as 9713a94aa11b9e090a284f6d7bd444c1d995d193

[commit-bot: I haz the power, 2014-09-25 23:13:17]

Patchset 2 (id:??) landed as
https://crrev.com/cfdd7ba3cf8658df5a5484b716a1dc48ce3e0674
Cr-Commit-Position: refs/heads/master@{#296820}