Cleanup changes in gcm_network_channel

Cleanup changes in gcm_network_channel

No functionality change, just moving things around.
- Move functions so that it is more convenient to read .cc file top to bottom.
- replace ANDROID with OS_ANDROID. Looking at other places in the code OS_ANDROID is much more popular way to check for android.

R=rlarocque@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=260357

[rlarocque, 2014-03-28 22:02:31]

I didn't look closely at the changes, since I'm assuming based on the CL
descriptions that nothing has actually changed.  Let me know if that's a bad
assumption.

lgtm

[pavely, 2014-03-28 22:25:24]

The CQ bit was checked by pavely@chromium.org

[commit-bot: I haz the power, 2014-03-28 22:27:06]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/pavely@chromium.org/217653002/1

[commit-bot: I haz the power, 2014-03-29 00:49:50]

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

[commit-bot: I haz the power, 2014-03-29 00:49:51]

Commit queue rejected this change because the description was changed
between the time the change entered the commit queue and the time it
was ready to commit. You can safely check the commit box again.

[pavely, 2014-03-29 00:51:09]

The CQ bit was checked by pavely@chromium.org

[commit-bot: I haz the power, 2014-03-29 00:52:12]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/pavely@chromium.org/217653002/1

[commit-bot: I haz the power, 2014-03-29 02:25:46]

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

[commit-bot: I haz the power, 2014-03-29 02:25:48]

Try jobs failed on following builders:
  tryserver.chromium on linux_chromium_chromeos_rel

[pavely, 2014-03-29 02:43:29]

The CQ bit was checked by pavely@chromium.org

[commit-bot: I haz the power, 2014-03-29 02:43:36]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/pavely@chromium.org/217653002/1

[commit-bot: I haz the power, 2014-03-29 04:14:03]

Change committed as 260357