PrintPreview: Make ctrl-shift-p start the native print flow.

chrome/browser/ui/webui/print_preview_handler.h

 // Copyright (c) 2011 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_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_HANDLER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 40 matching lines @@
   void SelectFile(const FilePath& default_path);
 
   // Called when the print preview tab is destroyed. This is the last time
   // this object has access to the PrintViewManager in order to disconnect the
   // observer.
   void OnTabDestroyed();
 
   // Called when print preview failed.
   void OnPrintPreviewFailed();
 
+  // Called when the user press ctrl+shift+p to display the native system
+  // dialog.
+  void ShowSystemDialog();
+
  private:
   friend class PrintSystemTaskProxy;
 
   TabContents* preview_tab();
 
   // Gets the default printer. |args| is unused.
   void HandleGetDefaultPrinter(const base::ListValue* args);
 
   // Gets the list of printers. |args| is unused.
   void HandleGetPrinters(const base::ListValue* args);
@@ skipping 101 matching lines @@
   // Whether we have already logged a failed print preview.
   bool reported_failed_preview_;
 
   // Whether we have already logged the number of printers this session.
   bool has_logged_printers_count_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_HANDLER_H_