Standardize usage of virtual/override/final in components/

components/dom_distiller/content/dom_distiller_viewer_source.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 COMPONENTS_DOM_DISTILLER_CONTENT_DOM_DISTILLER_VIEWER_SOURCE_H_
 #define COMPONENTS_DOM_DISTILLER_CONTENT_DOM_DISTILLER_VIEWER_SOURCE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "content/public/browser/url_data_source.h"
 
 namespace dom_distiller {
 
 class DomDistillerServiceInterface;
 class DomDistillerViewerSourceTest;
 class ViewerHandle;
 class ViewRequestDelegate;
 
 // Serves HTML and resources for viewing distilled articles.
 class DomDistillerViewerSource : public content::URLDataSource {
  public:
   DomDistillerViewerSource(DomDistillerServiceInterface* dom_distiller_service,
                            const std::string& scheme);
-  virtual ~DomDistillerViewerSource();
+  ~DomDistillerViewerSource() override;
 
   class RequestViewerHandle;
 
   // Overridden from content::URLDataSource:
-  virtual std::string GetSource() const override;
-  virtual void StartDataRequest(
+  std::string GetSource() const override;
+  void StartDataRequest(
       const std::string& path,
       int render_process_id,
       int render_frame_id,
       const content::URLDataSource::GotDataCallback& callback) override;
-  virtual std::string GetMimeType(const std::string& path) const override;
-  virtual bool ShouldServiceRequest(
-      const net::URLRequest* request) const override;
-  virtual void WillServiceRequest(const net::URLRequest* request,
-                                  std::string* path) const override;
-  virtual std::string GetContentSecurityPolicyObjectSrc() const override;
+  std::string GetMimeType(const std::string& path) const override;
+  bool ShouldServiceRequest(const net::URLRequest* request) const override;
+  void WillServiceRequest(const net::URLRequest* request,
+                          std::string* path) const override;
+  std::string GetContentSecurityPolicyObjectSrc() const override;
 
  private:
   friend class DomDistillerViewerSourceTest;
 
   // The scheme this URLDataSource is hosted under.
   std::string scheme_;
 
   // The service which contains all the functionality needed to interact with
   // the list of articles.
   DomDistillerServiceInterface* dom_distiller_service_;
 
   DISALLOW_COPY_AND_ASSIGN(DomDistillerViewerSource);
 };
 
 }  // namespace dom_distiller
 
 #endif  // COMPONENTS_DOM_DISTILLER_CONTENT_DOM_DISTILLER_VIEWER_SOURCE_H_