Move setup of code event handlers to gin

Move setup of code event handlers to gin

This will make sure that the handlers are set at the correct point
during v8::Isolate construction

BUG=none
R=svenpanne@chromium.org

Committed: https://crrev.com/4879fd2c9e48ddadd001fed382163c26586476ce
Cr-Commit-Position: refs/heads/master@{#295066}

[jochen (gone - plz use gerrit), 2014-09-15 10:03:48]

ptal

depends on https://codereview.chromium.org/570993002

[Sven Panne, 2014-09-15 10:45:22]

lgtm

[jochen (gone - plz use gerrit), 2014-09-16 11:28:25]

The CQ bit was checked by jochen@chromium.org

[commit-bot: I haz the power, 2014-09-16 11:28:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/567343002/1

[commit-bot: I haz the power, 2014-09-16 11:31:14]

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

[commit-bot: I haz the power, 2014-09-16 11:31:15]

Try jobs failed on following builders:
  mac_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/mac_gpu/builds/56472)
  ios_dbg_simulator on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)
  ios_rel_device on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device/bu...)
  ios_rel_device_ninja on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ni...)
  mac_chromium_compile_dbg on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)
  mac_chromium_rel_swarming on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)
  win_chromium_x64_rel_swarming on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[jochen (gone - plz use gerrit), 2014-09-16 12:15:47]

The CQ bit was checked by jochen@chromium.org

[commit-bot: I haz the power, 2014-09-16 12:16:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/567343002/20001

[commit-bot: I haz the power, 2014-09-16 15:05:31]

Committed patchset #2 (id:20001) as 4feb82160c71b17dc5142144df797d7d79fd348b

[commit-bot: I haz the power, 2014-09-16 15:07:17]

Patchset 2 (id:??) landed as
https://crrev.com/4879fd2c9e48ddadd001fed382163c26586476ce
Cr-Commit-Position: refs/heads/master@{#295066}