Add onGetUsbPrinterInfoRequested event to printerProvider API.

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 <string>
 
 #include "base/files/file_path.h"
@@ skipping 115 matching lines @@
   // 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);
 
   // Starts getting all local USB printers supported by extensions. |args| is
   // unused.
   void HandleGetExtensionUsbPrinters(const base::ListValue* args);
 
+  // Grants an extension access to a USB printer.  First element of |args| is
+  // the extension ID and the second element is USB device ID.
+  void HandleGrantExtensionUsbPrinterAccess(const base::ListValue* args);
+
   // Stops getting all local privet printers. |arg| is unused.
   void HandleStopGetPrivetPrinters(const base::ListValue* args);
 
   // Asks the initiator renderer to generate a preview.  First element of |args|
   // is a job settings JSON string.
   void HandleGetPreview(const base::ListValue* args);
 
   // Gets the job settings from Web UI and initiate printing. First element of
   // |args| is a job settings JSON string.
   void HandlePrint(const base::ListValue* args);
@@ skipping 164 matching lines @@
   // Called when a list of printers is reported by an extension.
   // |printers|: The list of printers managed by the extension.
   // |done|: Whether all the extensions have reported the list of printers
   //     they manage.
   void OnGotPrintersForExtension(const base::ListValue& printers, bool done);
 
   // Called with the list of USB printers supported by extensions.
   // |printers|: The list of printers supported by extensions.
   void OnGotExtensionUsbPrinters(const base::ListValue& printers);
 
+  // Called when an extension reports information for a USB printer it has just
+  // been granted access to.
+  // |extension_id|: The extension that was queried.
+  // |device_id|: The id of the USB device.
+  // |printer_info|: The data reported by the extension.
+  void OnGotExtensionUsbPrinterInfo(const std::string& extension_id,
+                                    int device_id,
+                                    const base::DictionaryValue& printer_info);
+
   // Called when an extension reports the set of print capabilites for a
   // printer.
   // |printer_id|: The id of the printer whose capabilities are reported.
   // |capabilities|: The printer capabilities.
   void OnGotExtensionPrinterCapabilities(
       const std::string& printer_id,
       const base::DictionaryValue& capabilities);
 
   // Called when an extension print job is completed.
   // |success|: Whether the job succeeded.
@@ skipping 56 matching lines @@
   // 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_;
 
   base::WeakPtrFactory<PrintPreviewHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_