Print Preview: Fixing behavior of event listeners.

chrome/browser/ui/webui/print_preview_ui.h

Index: chrome/browser/ui/webui/print_preview_ui.h
diff --git a/chrome/browser/ui/webui/print_preview_ui.h b/chrome/browser/ui/webui/print_preview_ui.h
index 192611bc16a2ede8d125b3838ad002fd82ade6d7..ab0ecf76f4d49839a1a71914111b083c2489c9f7 100644
--- a/chrome/browser/ui/webui/print_preview_ui.h
+++ b/chrome/browser/ui/webui/print_preview_ui.h
@@ -43,13 +43,16 @@ class PrintPreviewUI : public ChromeWebUI {
 
   // Notify the Web UI that the print preview will have |page_count| pages.
   // |is_modifiable| indicates if the preview can be rerendered with different
-  // print settings.
+  // print settings. |preview_request_id| indicates wich request resulted in
+  // this response.
   void OnDidGetPreviewPageCount(int document_cookie_,
                                 int page_count,
-                                bool is_modifiable);
+                                bool is_modifiable,
+                                int preview_request_id);
 
   // Notify the Web UI that the 0-based page |page_number| has been rendered.
-  void OnDidPreviewPage(int page_number);
+  // |preview_request_id| indicates wich request resulted in this response.
+  void OnDidPreviewPage(int page_number, int preview_request_id);
 
   // Notify the Web UI renderer that preview data is available.
   // |expected_pages_count| specifies the total number of pages.