Print Preview: Use cr.sendWithPromise for getInitialSettings

chrome/browser/ui/webui/print_preview/print_preview_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_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 203 matching lines @@
   // async HTTP request) and worse yet, on Windows and Chrome OS, the opened
   // window opens behind the initiator window.
   void HandleForceOpenNewTab(const base::ListValue* args);
 
   void HandleGetPrivetPrinterCapabilities(const base::ListValue* arg);
 
   // Requests an extension managed printer's capabilities.
   // |arg| contains the ID of the printer whose capabilities are requested.
   void HandleGetExtensionPrinterCapabilities(const base::ListValue* args);
 
-  void SendInitialSettings(const std::string& default_printer);
+  void SendInitialSettings(const std::string& callback_id,
+                           const std::string& default_printer);
 
   // Send OAuth2 access token.
   void SendAccessToken(const std::string& type,
                        const std::string& access_token);
 
   // Sends the printer capabilities to the Web UI. |settings_info| contains
   // printer capabilities information. If |settings_info| is empty, sends
   // error notification to the Web UI instead.
   void SendPrinterCapabilities(
       const std::string& printer_name,
@@ skipping 165 matching lines @@
   // Proxy for calls to the print backend.  Lazily initialized since web_ui() is
   // not available at construction time.
   std::unique_ptr<printing::PrinterBackendProxy> printer_backend_proxy_;
 
   base::WeakPtrFactory<PrintPreviewHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_