Interrogate PpdProvider from PrintPreview.

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 23 matching lines @@
 }
 
 namespace content {
 class WebContents;
 }
 
 namespace gfx {
 class Size;
 }
 
+namespace printing {
+class PrinterBackendProxy;
+}
+
 // The handler for Javascript messages related to the print preview dialog.
 class PrintPreviewHandler
     : public content::WebUIMessageHandler,
 #if BUILDFLAG(ENABLE_SERVICE_DISCOVERY)
       public cloud_print::PrivetLocalPrinterLister::Delegate,
       public cloud_print::PrivetLocalPrintOperation::Delegate,
 #endif
       public ui::SelectFileDialog::Listener,
       public GaiaCookieManagerService::Observer {
  public:
@@ skipping 50 matching lines @@
  private:
   friend class PrintPreviewPdfGeneratedBrowserTest;
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewPdfGeneratedBrowserTest,
                            MANUAL_DummyTest);
   class AccessTokenService;
 
   content::WebContents* preview_web_contents() const;
 
   PrintPreviewUI* print_preview_ui() const;
 
+  printing::PrinterBackendProxy* printer_backend_proxy();
+
   // Gets the list of printers. |args| is unused.
   void HandleGetPrinters(const base::ListValue* args);
 
   // Starts getting all local privet printers. |args| is unused.
   void HandleGetPrivetPrinters(const base::ListValue* args);
 
   // Starts getting all local extension managed printers. |args| is unused.
   void HandleGetExtensionPrinters(const base::ListValue* args);
 
   // Grants an extension access to a provisional printer.  First element of
@@ skipping 249 matching lines @@
 #endif
 
   // Handles requests for extension printers. Created lazily by calling
   // |EnsureExtensionPrinterHandlerSet|.
   std::unique_ptr<PrinterHandler> extension_printer_handler_;
 
   // Notifies tests that want to know if the PDF has been saved. This doesn't
   // notify the test if it was a successful save, only that it was attempted.
   base::Closure pdf_file_saved_closure_;
 
+  // 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_