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

chrome/renderer/extensions/automation_internal_custom_bindings.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 CHROME_RENDERER_EXTENSIONS_AUTOMATION_INTERNAL_CUSTOM_BINDINGS_H_
 #define CHROME_RENDERER_EXTENSIONS_AUTOMATION_INTERNAL_CUSTOM_BINDINGS_H_
 
 #include "base/compiler_specific.h"
 #include "extensions/renderer/object_backed_native_handler.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 
 // The native component of custom bindings for the chrome.automationInternal
 // API.
 class AutomationInternalCustomBindings : public ObjectBackedNativeHandler {
  public:
   explicit AutomationInternalCustomBindings(ScriptContext* context);
 
-  virtual ~AutomationInternalCustomBindings();
+  ~AutomationInternalCustomBindings() override;
 
  private:
   // Returns whether this extension has the "interact" permission set (either
   // explicitly or implicitly after manifest parsing).
   void IsInteractPermitted(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   // Returns an object with bindings that will be added to the
   // chrome.automation namespace.
   void GetSchemaAdditions(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   DISALLOW_COPY_AND_ASSIGN(AutomationInternalCustomBindings);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_AUTOMATION_INTERNAL_CUSTOM_BINDINGS_H_