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

content/renderer/browser_plugin/browser_plugin_manager.h

Index: content/renderer/browser_plugin/browser_plugin_manager.h
diff --git a/content/renderer/browser_plugin/browser_plugin_manager.h b/content/renderer/browser_plugin/browser_plugin_manager.h
index 3793ae6886c99f15083ecbd4e75d79982a21f292..9895318cd31f9284ddbbc096cbbc3ca4c8e7be4f 100644
--- a/content/renderer/browser_plugin/browser_plugin_manager.h
+++ b/content/renderer/browser_plugin/browser_plugin_manager.h
@@ -54,21 +54,21 @@ class CONTENT_EXPORT BrowserPluginManager
   int GetNextInstanceID();
 
   // RenderViewObserver override. Call on render thread.
-  virtual void DidCommitCompositorFrame() override;
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
-  virtual bool Send(IPC::Message* msg) override;
+  void DidCommitCompositorFrame() override;
+  bool OnMessageReceived(const IPC::Message& message) override;
+  bool Send(IPC::Message* msg) override;
 
   // Don't destroy the BrowserPluginManager when the RenderViewImpl goes away.
   // BrowserPluginManager's lifetime is managed by a reference count. Once
   // the host RenderViewImpl and all BrowserPlugins release their references,
   // then the BrowserPluginManager will be destroyed.
-  virtual void OnDestruct() override {}
+  void OnDestruct() override {}
 
  protected:
   // Friend RefCounted so that the dtor can be non-public.
   friend class base::RefCounted<BrowserPluginManager>;
 
-  virtual ~BrowserPluginManager();
+  ~BrowserPluginManager() override;
   // This map is keyed by guest instance IDs.
   IDMap<BrowserPlugin> instances_;
   int current_instance_id_;