Tighten the check for detecting misbehaving proxies in device management requests.

BUG=chromium-os:20775
TEST=Using a misconfigured-proxy but with direct connections working, registering without a serial shows the serial number invalid error instead of network error.


Review URL: http://codereview.chromium.org/9317033

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@120073 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/policy/device_management_service.cc

@@ -540,6 +540,7 @@ void DeviceManagementService::OnURLFetchComplete(
       LOG(WARNING) << "Proxy failed while contacting dmserver.";
       retry = true;
     } else if (source->GetStatus().is_success() &&
+               source->GetResponseCode() == kSuccess &&
                source->WasFetchedViaProxy() &&
                !IsProtobufMimeType(source)) {
       // The proxy server can be misconfigured but pointing to an existing