ipc: Add missing includes for USE_ATTACHMENT_BROKER.

ipc: Add missing includes for USE_ATTACHMENT_BROKER.

The preprocessor variable is defined in ipc/attachment_broker.h. There were
three files that were using the variable without including the header.

BUG=535711
Committed: https://crrev.com/87397e0140327124f38096d1fc88190a6154a9fd
Cr-Commit-Position: refs/heads/master@{#353448}

[erikchen, 2015-10-08 23:31:31]

erikchen@chromium.org changed reviewers:
+ avi@chromium.org, tsepez@chromium.org

[erikchen, 2015-10-08 23:31:31]

tsepez: Please review ipc/
avi: Please review content/

[erikchen, 2015-10-08 23:31:36]

The CQ bit was checked by erikchen@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-10-08 23:33:30]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1392713004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1392713004/1

[Tom Sepez, 2015-10-08 23:34:45]

lgtm

[Avi (use Gerrit), 2015-10-08 23:42:03]

lgtm

[commit-bot: I haz the power, 2015-10-09 00:05:45]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-10-09 00:05:45]

Dry run: Try jobs failed on following builders:
  win8_chromium_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_ng/...)
  win_chromium_compile_dbg_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_comp...)
  win_chromium_x64_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[erikchen, 2015-10-09 22:11:29]

The CQ bit was checked by erikchen@chromium.org

[erikchen, 2015-10-09 22:11:29]

The patchset sent to the CQ was uploaded after l-g-t-m from tsepez@chromium.org,
avi@chromium.org
Link to the patchset: https://codereview.chromium.org/1392713004/#ps20001
(title: "Exclude windows from logic that uses new field on
IPC::Message::Header.")

[commit-bot: I haz the power, 2015-10-09 22:14:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1392713004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1392713004/20001

[erikchen, 2015-10-09 23:32:11]

The CQ bit was unchecked by erikchen@chromium.org

[erikchen, 2015-10-09 23:42:47]

The CQ bit was checked by erikchen@chromium.org

[erikchen, 2015-10-09 23:42:47]

The patchset sent to the CQ was uploaded after l-g-t-m from tsepez@chromium.org,
avi@chromium.org
Link to the patchset: https://codereview.chromium.org/1392713004/#ps40001
(title: "Fix unit test.")

[commit-bot: I haz the power, 2015-10-09 23:43:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1392713004/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1392713004/40001

[commit-bot: I haz the power, 2015-10-10 01:10:32]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-10-10 01:11:13]

Patchset 3 (id:??) landed as
https://crrev.com/87397e0140327124f38096d1fc88190a6154a9fd
Cr-Commit-Position: refs/heads/master@{#353448}