Print preview page selection should not require a rerendering of draft pages.

chrome/renderer/mock_render_thread.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_RENDERER_MOCK_RENDER_THREAD_H_
 #define CHROME_RENDERER_MOCK_RENDER_THREAD_H_
 #pragma once
 
 #include <string>
 
@@ skipping 108 matching lines @@
   // PrintWebViewHelper expects default print settings.
   void OnGetDefaultPrintSettings(PrintMsg_Print_Params* setting);
 
   // PrintWebViewHelper expects final print settings from the user.
   void OnScriptedPrint(const PrintHostMsg_ScriptedPrint_Params& params,
                        PrintMsg_PrintPages_Params* settings);
 
   void OnDidGetPrintedPagesCount(int cookie, int number_pages);
   void OnDidPrintPage(const PrintHostMsg_DidPrintPage_Params& params);
   void OnDidGetPreviewPageCount(int document_cookie, int number_pages,
-                                bool is_modifiable);
+                                bool is_modifiable, bool clear_preview_data);
   void OnDidPreviewPage(const PrintHostMsg_DidPreviewPage_Params& params);
 
   // For print preview, PrintWebViewHelper will update settings.
   void OnUpdatePrintSettings(int document_cookie,
                              const DictionaryValue& job_settings,
                              PrintMsg_PrintPages_Params* params);
 
   IPC::TestSink sink_;
 
   // Routing id what will be assigned to the Widget.
@@ skipping 13 matching lines @@
   scoped_ptr<MockPrinter> printer_;
 
   // True to simulate user clicking print. False to cancel.
   bool print_dialog_user_response_;
 
   // Number of pages to generate for print preview.
   int print_preview_pages_remaining_;
 };
 
 #endif  // CHROME_RENDERER_MOCK_RENDER_THREAD_H_