Standardize usage of virtual/override/final in chrome/renderer/

chrome/renderer/plugins/chrome_plugin_placeholder.h

 // Copyright 2013 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 CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_
 #define CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_
 
 #include "components/plugins/renderer/plugin_placeholder.h"
 
 struct ChromeViewHostMsg_GetPluginInfo_Status;
@@ skipping 29 matching lines @@
 #if defined(ENABLE_PLUGIN_INSTALLATION)
   int32 CreateRoutingId();
 #endif
 
  private:
   ChromePluginPlaceholder(content::RenderFrame* render_frame,
                           blink::WebLocalFrame* frame,
                           const blink::WebPluginParams& params,
                           const std::string& html_data,
                           const base::string16& title);
-  virtual ~ChromePluginPlaceholder();
+  ~ChromePluginPlaceholder() override;
 
   // WebViewPlugin::Delegate (via PluginPlaceholder) method
-  virtual void BindWebFrame(blink::WebFrame* frame) override;
+  void BindWebFrame(blink::WebFrame* frame) override;
 
   // gin::Wrappable (via PluginPlaceholder) method
-  virtual gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
+  gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
       v8::Isolate* isolate) override;
 
   // content::RenderViewObserver (via PluginPlaceholder) override:
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
 
   // WebViewPlugin::Delegate (via PluginPlaceholder) methods:
-  virtual void ShowContextMenu(const blink::WebMouseEvent&) override;
+  void ShowContextMenu(const blink::WebMouseEvent&) override;
 
   // content::RenderProcessObserver methods:
-  virtual void PluginListChanged() override;
+  void PluginListChanged() override;
 
   // content::ContextMenuClient methods:
-  virtual void OnMenuAction(int request_id, unsigned action) override;
-  virtual void OnMenuClosed(int request_id) override;
+  void OnMenuAction(int request_id, unsigned action) override;
+  void OnMenuClosed(int request_id) override;
 
   // Javascript callback opens chrome://plugins in a new tab.
   void OpenAboutPluginsCallback();
 
   void OnLoadBlockedPlugins(const std::string& identifier);
   void OnSetIsPrerendering(bool is_prerendering);
 #if defined(ENABLE_PLUGIN_INSTALLATION)
   void OnDidNotFindMissingPlugin();
   void OnFoundMissingPlugin(const base::string16& plugin_name);
   void OnStartedDownloadingPlugin();
@@ skipping 15 matching lines @@
 #endif
 
   bool has_host_;
   int context_menu_request_id_;  // Nonzero when request pending.
   base::string16 plugin_name_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromePluginPlaceholder);
 };
 
 #endif  // CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_