[BackgroundSyncManager] Remove origin argument from public BackgroundSyncManager methods

[BackgroundSyncManager] Remove origin argument from public BackgroundSyncManager methods

The origin can be determined from the live ServiceWorkerRegistration,
use that instead of requiring the renderer to pass it.

Also, verify that the live registration is active to prevent
BackgroundSyncManager::Register from being called prematurely.

BUG=482012
Committed: https://crrev.com/c1a361d95254ab697b077187d0c6204cb18722b9
Cr-Commit-Position: refs/heads/master@{#327371}

[jkarlin, 2015-04-28 16:34:09]

jkarlin@chromium.org changed reviewers:
+ jsbell@chromium.org

[jkarlin, 2015-04-28 16:34:10]

jsbell@ PTAL at everything, thanks!

[jsbell, 2015-04-28 20:52:33]

lgtm

https://codereview.chromium.org/1110993003/diff/1/content/browser/background_...
File content/browser/background_sync/background_sync_manager.cc (right):

https://codereview.chromium.org/1110993003/diff/1/content/browser/background_...
content/browser/background_sync/background_sync_manager.cc:282:
sw_registration->pattern().GetOrigin(),
It seems to me we should probably have ServiceWorkerRegistration expose origin
directly rather than requiring to extract it from the pattern in case we support
multiple patterns, but that should be a different CL.

https://codereview.chromium.org/1110993003/diff/1/content/browser/background_...
File content/browser/background_sync/background_sync_manager_unittest.cc
(right):

https://codereview.chromium.org/1110993003/diff/1/content/browser/background_...
content/browser/background_sync/background_sync_manager_unittest.cc:185: //
calling BackgroundSyncMasnager::Register.
Typo: "Masnager"

[jkarlin, 2015-04-28 20:54:13]

The CQ bit was checked by jkarlin@chromium.org

[commit-bot: I haz the power, 2015-04-28 20:55:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1110993003/1

[commit-bot: I haz the power, 2015-04-28 22:01:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-28 22:01:56]

Patchset 1 (id:??) landed as
https://crrev.com/c1a361d95254ab697b077187d0c6204cb18722b9
Cr-Commit-Position: refs/heads/master@{#327371}