Specifying a timeout when acquiring wake locks. Defensive code in case we lose track. If we're pre SDK 14, we do not specify a timeout due to https://code.google.com/p/android/issues/detail?id=11622. git-svn-id: http://google-cache-invalidation-api.googlecode.com/svn/trunk/src@263 1cc9d426-c294-39be-ba72-c0199ca0f247