const char kCloudPrintUserAgent[] = "GoogleCloudPrintProxy";
const char kChromeCloudPrintProxyHeader[] = "X-CloudPrint-Proxy: Chrome";
const char kCloudPrintPushNotificationsSource[] = "cloudprint.google.com";
-const char kCloudPrintAuth[] = "https://www.googleapis.com/auth/cloudprint";
const char kProxyIdValue[] = "proxy";
const char kPrinterNameValue[] = "printer";