Fix ipc fuzzer crash

Fix ipc fuzzer null pointer crash due to wrong order of mojo initialization.

TBR=morrita@chromium.org,tsepez@chromium.org
BUG=453571
Committed: https://chromium.googlesource.com/chromium/src/+/5bbc435bd67916d7edee982a7e6dc88ab20e0c20

[inferno, 2015-01-31 06:39:53]

The CQ bit was checked by inferno@chromium.org

[commit-bot: I haz the power, 2015-01-31 06:40:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/872673008/1

[commit-bot: I haz the power, 2015-01-31 12:06:53]

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

[commit-bot: I haz the power, 2015-01-31 12:06:54]

Try jobs failed on following builders:
  win8_chromium_gn_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_gn_...)

[inferno, 2015-01-31 12:18:08]

The CQ bit was checked by inferno@chromium.org

[commit-bot: I haz the power, 2015-01-31 12:18:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/872673008/1

[commit-bot: I haz the power, 2015-01-31 15:01:38]

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

[commit-bot: I haz the power, 2015-01-31 15:01:39]

Try jobs failed on following builders:
  win8_chromium_gn_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_gn_...)

[commit-bot: I haz the power, 2015-01-31 15:08:45]

Patchset 1 (id:??) landed as
https://crrev.com/5bbc435bd67916d7edee982a7e6dc88ab20e0c20
Cr-Commit-Position: refs/heads/master@{#314054}

[inferno, 2015-01-31 15:08:53]

Committed patchset #1 (id:1) manually as
5bbc435bd67916d7edee982a7e6dc88ab20e0c20 (tree was closed).

[Hajime Morrita, 2015-02-02 18:31:19]

On 2015/01/31 15:08:53, inferno wrote:
> Committed patchset #1 (id:1) manually as
> 5bbc435bd67916d7edee982a7e6dc88ab20e0c20 (tree was closed).

lgtm.