Network Settings proxy: Fix 'use same' toggle logic

Bug: 876111
Change-Id: I8338c42e716142c4280336ea223205941002c6bf
Reviewed-on: https://chromium-review.googlesource.com/1185724Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589645}

ui/webui/resources/cr_components/chromeos/network/network_proxy.js

@@ -191,7 +191,8 @@ Polymer({
             (CrOnc.proxyMatches(jsonHttp, proxy.Manual.SecureHTTPProxy) &&
              CrOnc.proxyMatches(jsonHttp, proxy.Manual.FTPProxy) &&
              CrOnc.proxyMatches(jsonHttp, proxy.Manual.SOCKS)) ||
-            (!proxy.Manual.SecureHTTPProxy.Host &&
+            (!proxy.Manual.HTTPProxy.Host &&
+             !proxy.Manual.SecureHTTPProxy.Host &&
              !proxy.Manual.FTPProxy.Host && !proxy.Manual.SOCKS.Host);
       }
       if (proxySettings.ExcludeDomains) {