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

printing/printing_context_win.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_WIN_H_
 #define PRINTING_PRINTING_CONTEXT_WIN_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "printing/printing_context.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace printing {
 
 class PrintSettings;
 
 class PRINTING_EXPORT PrintingContextWin : public PrintingContext {
  public:
   explicit PrintingContextWin(Delegate* delegate);
-  virtual ~PrintingContextWin();
+  ~PrintingContextWin() override;
 
   // PrintingContext implementation.
-  virtual void AskUserForSettings(
+  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;
+  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;
 
  protected:
   static HWND GetRootWindow(gfx::NativeView view);
 
   // Reads the settings from the selected device context. Updates settings_ and
   // its margins.
   virtual Result InitializeSettings(const base::string16& device_name,
                                     DEVMODE* dev_mode);
 
   HDC contest() const { return context_; }
@@ skipping 11 matching lines @@
 
   // The selected printer context.
   HDC context_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintingContextWin);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_WIN_H_