contacts: Defer updates when offline.

contacts: Defer updates when offline.

This make GoogleContactStore postpone trying to update
contacts via GData when the system doesn't have a network
connection.

BUG=128805
TEST=none


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=150643

[satorux1, 2012-08-08 21:42:27]

LGTM

http://codereview.chromium.org/10829247/diff/1/chrome/browser/chromeos/contac...
File chrome/browser/chromeos/contacts/google_contact_store.h (right):

http://codereview.chromium.org/10829247/diff/1/chrome/browser/chromeos/contac...
chrome/browser/chromeos/contacts/google_contact_store.h:40: public
net::NetworkChangeNotifier::ConnectionTypeObserver {
I didn't know about this. in gdata_sync_client.cc, I used a Chrome OS specific
class NetworkLibrary, but net::NetworkChangeNotifier seems to be a better
solution. I'll file a bug about the cleanup.

[commit-bot: I haz the power, 2012-08-08 21:45:27]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/derat@chromium.org/10829247/1

[commit-bot: I haz the power, 2012-08-09 00:08:36]

Change committed as 150643