[BackgroundSync] Use appopriate type parameters for WebCallbacks (3/4)

This series of CLs fixes WebCallback parameter types used in BackgroundSync.

 - WebSyncRegistration* (ownership transferred)
  => PassOwnPtr<WebServiceWorkerResponse>
 - bool* (ownership transferred)
  => bool
 - WebVector<WebSyncRegstration*>* (ownership transferred)
  => const WebVector<WebSyncRegistration*>&
 - WebPermissionStatus* (ownership transferred)
  => WebPermissionStatus
 - WebSyncError* (ownership transferred)
  => const WebSyncError&

1/4: https://codereview.chromium.org/1309143002/
2/4: https://codereview.chromium.org/1311053002/
3/4: https://codereview.chromium.org/1308273002/
4/4: https://codereview.chromium.org/1308283002/

BUG=493531

Review URL: https://codereview.chromium.org/1308273002

Cr-Commit-Position: refs/heads/master@{#345895}
1 file changed