Standardize usage of virtual/override/final in content/browser/

content/browser/manifest/manifest_manager_host.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 CONTENT_RENDERER_MANIFEST_MANIFEST_MANAGER_HOST_H_
 #define CONTENT_RENDERER_MANIFEST_MANIFEST_MANAGER_HOST_H_
 
 #include "base/callback_forward.h"
 #include "base/id_map.h"
 #include "content/public/browser/web_contents_observer.h"
 
 namespace content {
 
 class RenderFrameHost;
 class WebContents;
 struct Manifest;
 
 // ManifestManagerHost is a helper class that allows callers to get the Manifest
 // associated with a frame. It handles the IPC messaging with the child process.
 // TODO(mlamouri): keep a cached version and a dirty bit here.
 class ManifestManagerHost : public WebContentsObserver {
  public:
   explicit ManifestManagerHost(WebContents* web_contents);
-  virtual ~ManifestManagerHost();
+  ~ManifestManagerHost() override;
 
   typedef base::Callback<void(const Manifest&)> GetManifestCallback;
 
   // Calls the given callback with the manifest associated with the
   // given RenderFrameHost. If the frame has no manifest or if getting it failed
   // the callback will have an empty manifest.
   void GetManifest(RenderFrameHost*, const GetManifestCallback&);
 
   // WebContentsObserver
-  virtual bool OnMessageReceived(const IPC::Message&,
-                                 RenderFrameHost*) override;
-  virtual void RenderFrameDeleted(RenderFrameHost*) override;
+  bool OnMessageReceived(const IPC::Message&, RenderFrameHost*) override;
+  void RenderFrameDeleted(RenderFrameHost*) override;
 
  private:
   typedef IDMap<GetManifestCallback, IDMapOwnPointer> CallbackMap;
   typedef base::hash_map<RenderFrameHost*, CallbackMap*> FrameCallbackMap;
 
   void OnRequestManifestResponse(
       RenderFrameHost*, int request_id, const Manifest&);
 
   // Returns the CallbackMap associated with the given RenderFrameHost, or null.
   CallbackMap* GetCallbackMapForFrame(RenderFrameHost*);
 
   FrameCallbackMap pending_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(ManifestManagerHost);
 };
 
 } // namespace content
 
 #endif // CONTENT_RENDERER_MANIFEST_MANIFEST_MANAGER_HOST_H_