Print Preview: Change getPrinterCapabilities to cr.sendWithPromise

chrome/browser/ui/webui/print_preview/printer_handler.h

 // Copyright 2015 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_PRINTER_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINTER_HANDLER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 17 matching lines @@
 
 // Wrapper around PrinterProviderAPI to be used by print preview.
 // It makes request lifetime management easier, and hides details of more
 // complex operations like printing from the print preview handler.
 // TODO(tbarzic): Use the same interface for other printer types.
 class PrinterHandler {
  public:
   using GetPrintersCallback =
       base::Callback<void(const base::ListValue& printers, bool done)>;
   using GetCapabilityCallback =
-      base::Callback<void(const std::string& printer_id,
-                          const base::DictionaryValue& capability)>;
+      base::Callback<void(const base::DictionaryValue& capability)>;
   using PrintCallback =
       base::Callback<void(bool success, const std::string& error)>;
   using GetPrinterInfoCallback =
       base::Callback<void(const base::DictionaryValue& printer_info)>;
 
   // Creates an instance of an PrinterHandler for extension printers.
   static std::unique_ptr<PrinterHandler> CreateForExtensionPrinters(
       content::BrowserContext* browser_context);
 
   virtual ~PrinterHandler() {}
@@ skipping 32 matching lines @@
       const std::string& destination_id,
       const std::string& capability,
       const base::string16& job_title,
       const std::string& ticket_json,
       const gfx::Size& page_size,
       const scoped_refptr<base::RefCountedMemory>& print_data,
       const PrintCallback& callback) = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINTER_HANDLER_H_