Update {virtual,override,final} to follow C++11 style in printing, round 2.

printing/printing_context_no_system_dialog.h

 // Copyright (c) 2011 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 PRINTING_PRINTING_CONTEXT_NO_SYSTEM_DIALOG_H_
 #define PRINTING_PRINTING_CONTEXT_NO_SYSTEM_DIALOG_H_
 
 #include <string>
 
 #include "printing/printing_context.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace printing {
 
 class PRINTING_EXPORT PrintingContextNoSystemDialog : public PrintingContext {
  public:
   explicit PrintingContextNoSystemDialog(Delegate* delegate);
-  virtual ~PrintingContextNoSystemDialog();
+  ~PrintingContextNoSystemDialog() override;
 
   // PrintingContext implementation.
-  virtual void AskUserForSettings(
-      int max_pages,
-      bool has_selection,
-      bool is_scripted,
-      const PrintSettingsCallback& callback) override;
-  virtual Result UseDefaultSettings() override;
-  virtual gfx::Size GetPdfPaperSizeDeviceUnits() override;
-  virtual Result UpdatePrinterSettings(bool external_preview,
-                                       bool show_system_dialog) override;
-  virtual Result InitWithSettings(const PrintSettings& settings) override;
-  virtual Result NewDocument(const base::string16& document_name) override;
-  virtual Result NewPage() override;
-  virtual Result PageDone() override;
-  virtual Result DocumentDone() override;
-  virtual void Cancel() override;
-  virtual void ReleaseContext() override;
-  virtual gfx::NativeDrawingContext context() const override;
+  void AskUserForSettings(int max_pages,
+                          bool has_selection,
+                          bool is_scripted,
+                          const PrintSettingsCallback& callback) override;
+  Result UseDefaultSettings() override;
+  gfx::Size GetPdfPaperSizeDeviceUnits() override;
+  Result UpdatePrinterSettings(bool external_preview,
+                               bool show_system_dialog) override;
+  Result InitWithSettings(const PrintSettings& settings) override;
+  Result NewDocument(const base::string16& document_name) override;
+  Result NewPage() override;
+  Result PageDone() override;
+  Result DocumentDone() override;
+  void Cancel() override;
+  void ReleaseContext() override;
+  gfx::NativeDrawingContext context() const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PrintingContextNoSystemDialog);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_NO_SYSTEM_DIALOG_H_