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

chrome/browser/ui/webui/print_preview_ui.cc

 // 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.
 
 #include "chrome/browser/ui/webui/print_preview_ui.h"
 
 #include <map>
 
 #include "base/lazy_instance.h"
 #include "base/metrics/histogram.h"
@@ skipping 86 matching lines @@
 
 void PrintPreviewUI::SetPrintPreviewDataForIndex(int index,
                                                  const RefCountedBytes* data) {
   print_preview_data_service()->SetDataEntry(preview_ui_addr_str_, index, data);
 }
 
 void PrintPreviewUI::ClearAllPreviewData() {
   print_preview_data_service()->RemoveEntry(preview_ui_addr_str_);
 }
 
+int PrintPreviewUI::GetAvailableDraftPageCount() {
+  return print_preview_data_service()->GetAvailableDraftPageCount(
+      preview_ui_addr_str_);
+}
+
 void PrintPreviewUI::SetInitiatorTabURLAndTitle(
     const std::string& initiator_url,
     const string16& job_title) {
   initiator_url_ = initiator_url;
   initiator_tab_title_ = job_title;
 }
 
 // static
 void PrintPreviewUI::GetCurrentPrintPreviewStatus(
     const std::string& preview_ui_addr,
@@ skipping 111 matching lines @@
 }
 
 void PrintPreviewUI::OnPrintPreviewFailed() {
   handler_->OnPrintPreviewFailed();
   CallJavascriptFunction("printPreviewFailed");
 }
 
 PrintPreviewDataService* PrintPreviewUI::print_preview_data_service() {
   return PrintPreviewDataService::GetInstance();
 }