Invoke createNetwork() callback with GUID, not service name
The current implementation doesn't match the API spec. Fix this.
BUG=
593196
TEST=go to chrome://settings/network , ctrl-shift-i, run in console:
chrome.networkingPrivate.createNetwork(false,
{"Type":"WiFi","WiFi":{"SSID":"GoogleGuest","AutoConnect":true}},
function(x) { console.log(x); })
Committed:
https://crrev.com/f1da84b10359d62c67a73e46da90b0d0510a0768
Cr-Commit-Position: refs/heads/master@{#381347}