Fix nits from earlier CLs

chrome/browser/ui/webui/print_preview/print_preview_ui.h

Index: chrome/browser/ui/webui/print_preview/print_preview_ui.h
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_ui.h b/chrome/browser/ui/webui/print_preview/print_preview_ui.h
index 89ff9b7f4770ea072e24d7d5c66fd9bf51a3dc13..5a4f8c248d9d0e04180293c3af28ec9e63cc934c 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_ui.h
+++ b/chrome/browser/ui/webui/print_preview/print_preview_ui.h
@@ -147,8 +147,7 @@ class PrintPreviewUI : public ConstrainedWebDialogUI {
   void OnSetOptionsFromDocument(
       const PrintHostMsg_SetOptionsFromDocument_Params& params);
 
-  // Allows tests to wait until the print preview dialog is loaded. Optionally
-  // also instructs the dialog to auto-cancel, which is used for testing only.
+  // Allows tests to wait until the print preview dialog is loaded.
   class TestingDelegate {
    public:
     virtual void DidGetPreviewPageCount(int page_count) = 0;