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

chrome/browser/printing/print_preview_data_service.h

Index: chrome/browser/printing/print_preview_data_service.h
diff --git a/chrome/browser/printing/print_preview_data_service.h b/chrome/browser/printing/print_preview_data_service.h
index 2e94393a9268946b0242a963ec3f64f847f1003c..3642876365e6b8b3164193dac1a7ae48dbd3ec46 100644
--- a/chrome/browser/printing/print_preview_data_service.h
+++ b/chrome/browser/printing/print_preview_data_service.h
@@ -40,6 +40,9 @@ class PrintPreviewDataService {
   // Remove the corresponding PrintPreviewUI entry from the map.
   void RemoveEntry(const std::string& preview_ui_addr_str);
 
+  // Returns the available draft page count.
+  int GetAvailableDraftPageCount(const std::string& preview_ui_addr_str);
+
  private:
   friend struct DefaultSingletonTraits<PrintPreviewDataService>;