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

extensions/browser/api/webcam_private/webcam_private_api.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_API_WEBCAM_PRIVATE_WEBCAM_PRIVATE_API_H_
 #define EXTENSIONS_BROWSER_API_WEBCAM_PRIVATE_WEBCAM_PRIVATE_API_H_
 
 #include "extensions/browser/extension_function.h"
 
 class Profile;
 
 namespace extensions {
 
 class WebcamPrivateSetFunction : public SyncExtensionFunction {
  public:
   WebcamPrivateSetFunction();
   DECLARE_EXTENSION_FUNCTION("webcamPrivate.set", WEBCAMPRIVATE_SET);
 
  protected:
-  virtual ~WebcamPrivateSetFunction();
-  virtual bool RunSync() override;
+  ~WebcamPrivateSetFunction() override;
+  bool RunSync() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebcamPrivateSetFunction);
 };
 
 class WebcamPrivateGetFunction : public SyncExtensionFunction {
  public:
   WebcamPrivateGetFunction();
   DECLARE_EXTENSION_FUNCTION("webcamPrivate.get", WEBCAMPRIVATE_GET);
 
  protected:
-  virtual ~WebcamPrivateGetFunction();
-  virtual bool RunSync() override;
+  ~WebcamPrivateGetFunction() override;
+  bool RunSync() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebcamPrivateGetFunction);
 };
 
 class WebcamPrivateResetFunction : public SyncExtensionFunction {
  public:
   WebcamPrivateResetFunction();
   DECLARE_EXTENSION_FUNCTION("webcamPrivate.reset", WEBCAMPRIVATE_RESET);
 
  protected:
-  virtual ~WebcamPrivateResetFunction();
-  virtual bool RunSync() override;
+  ~WebcamPrivateResetFunction() override;
+  bool RunSync() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebcamPrivateResetFunction);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_WEBCAM_PRIVATE_WEBCAM_PRIVATE_API_H_