Fix nits from earlier CLs

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

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 129 matching lines @@
   // Closes the print preview dialog.
   void OnClosePrintPreviewDialog();
 
   // Reload the printers list.
   void OnReloadPrintersList();
 
   // Notifies the WebUI to set print preset options from source PDF.
   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;
     virtual void DidRenderPreviewPage(content::WebContents* preview_dialog) = 0;
   };
 
   static void SetDelegateForTesting(TestingDelegate* delegate);
 
   // Allows for tests to set a file path to print a PDF to. This also initiates
   // the printing without having to click a button on the print preview dialog.
@@ skipping 31 matching lines @@
   // title.
   base::string16 initiator_title_;
 
   // Keeps track of whether OnClosePrintPreviewDialog() has been called or not.
   bool dialog_closed_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_