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..187051f30d1d5f01d578928486c888aab4227359 100644
--- a/chrome/browser/printing/print_preview_data_service.h
+++ b/chrome/browser/printing/print_preview_data_service.h
@@ -40,6 +40,10 @@ class PrintPreviewDataService {
   // Remove the corresponding PrintPreviewUI entry from the map.
   void RemoveEntry(const std::string& preview_ui_addr_str);
 
+  // Returns true if all the individual preview pages are available.
+  bool IsDraftPagesAvailable(const std::string& preview_ui_addr_str,

[vandebo (ex-Chrome), 2011/08/29 18:21:56]

This API is pretty fragile, you only get the right answer if you pass in the
correct count of draft pages.  Maybe it would be better to make more explicit
what information is available.  i.e. Make this method return the number of draft
pages stored.  Then the caller could compare that to the number it knows should
be there to come to the answer it needs.

[kmadhusu, 2011/08/30 17:27:00]

Done.

+                             int draft_page_count);
+
  private:
   friend struct DefaultSingletonTraits<PrintPreviewDataService>;