[CUPS] Implement the "Printers" section in chrome://settings.

chrome/browser/ui/webui/options/browser_options_handler.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS_BROWSER_OPTIONS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_BROWSER_OPTIONS_HANDLER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 263 matching lines @@
   // an appropriate dialog for configuring proxy settings.
   void ShowNetworkProxySettings(const base::ListValue* args);
 #endif
 
 #if !defined(USE_NSS_CERTS)
   // Callback for the "showManageSSLCertificates" message. This will invoke
   // an appropriate certificate management action based on the platform.
   void ShowManageSSLCertificates(const base::ListValue* args);
 #endif
 
+#if defined(OS_CHROMEOS)
+  void ShowCupsPrintDevicesPage(const base::ListValue* args);
+#endif  // defined(OS_CHROMEOS)
+
 #if BUILDFLAG(ENABLE_SERVICE_DISCOVERY)
   void ShowCloudPrintDevicesPage(const base::ListValue* args);
 #endif
 
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   // Register localized values used by Cloud Print
   void RegisterCloudPrintValues(base::DictionaryValue* values);
 #endif
 
   // Check if hotword is available. If it is, tell the javascript to show
@@ skipping 137 matching lines @@
 
   // Used to get WeakPtr to self for use on the UI thread.
   base::WeakPtrFactory<BrowserOptionsHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserOptionsHandler);
 };
 
 }  // namespace options
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_BROWSER_OPTIONS_HANDLER_H_