Print Preview: Create Save As PDF directory if it does not exist.

chrome/browser/ui/webui/print_preview/print_preview_handler.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_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 89 matching lines @@
 #endif
 
   int regenerate_preview_request_count() const {
     return regenerate_preview_request_count_;
   }
 
   // Sets |pdf_file_saved_closure_| to |closure|.
   void SetPdfSavedClosureForTesting(const base::Closure& closure);
 
  protected:
-  // If |prompt_user| is true, displays a modal dialog, prompting the user to
-  // select a file. Otherwise, just accept |default_path| and uniquify it.
+  // If |prompt_user| is true, starts a task to create the default Save As PDF
+  // directory if needed. |OnDirectoryCreated| will be called when this

[Lei Zhang, 2017/06/22 01:39:56]

nit: OnDirectoryCreated() is not a variable.

s/this/it/

[rbpotter, 2017/06/22 19:57:26]

Done.

+  // finishes to open the modal dialog and prompt the user. Otherwise, just
+  // accept |default_path| and uniquify it.
   // Protected so unit tests can access.
   virtual void SelectFile(const base::FilePath& default_path, bool prompt_user);
 
   // Handles printing to PDF. Protected to expose to unit tests.
   void PrintToPdf();
 
   // The underlying dialog object. Protected to expose to unit tests.
   scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
 
  private:
@@ skipping 133 matching lines @@
 
   // Closes the preview dialog.
   void ClosePreviewDialog();
 
   // Adds all the recorded stats taken so far to histogram counts.
   void ReportStats();
 
   // Clears initiator details for the print preview dialog.
   void ClearInitiatorDetails();
 
+  // Called when the directory to save to has been created. Opens a modal
+  // dialog to prompt the user to select the file for Save As PDF.
+  void OnDirectoryCreated(base::FilePath path);

[Lei Zhang, 2017/06/22 01:39:56]

Pass by const ref.

[rbpotter, 2017/06/22 19:57:26]

Done.

+
   // Posts a task to save |data| to pdf at |print_to_pdf_path_|.
   void PostPrintToPdfTask();
 
   // Populates |settings| according to the current locale.
   void GetNumberFormatAndMeasurementSystem(base::DictionaryValue* settings);
 
   bool GetPreviewDataAndTitle(scoped_refptr<base::RefCountedBytes>* data,
                               base::string16* title) const;
 
   // Helper for getting a unique file name for SelectFile() without prompting
@@ skipping 137 matching lines @@
   // Proxy for calls to the print backend.  Lazily initialized since web_ui() is
   // not available at construction time.
   std::unique_ptr<printing::PrinterBackendProxy> printer_backend_proxy_;
 
   base::WeakPtrFactory<PrintPreviewHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_