Standardize usage of virtual/override/final in chrome/browser/extensions/

chrome/browser/extensions/chrome_extension_function.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_BROWSER_EXTENSIONS_CHROME_EXTENSION_FUNCTION_H_
 #define CHROME_BROWSER_EXTENSIONS_CHROME_EXTENSION_FUNCTION_H_
 
 #include "extensions/browser/extension_function.h"
 
 class Browser;
@@ skipping 42 matching lines @@
   // shutdown when there are no active windows.
   //
   // TODO(stevenjb): Replace this with GetExtensionWindowController().
   Browser* GetCurrentBrowser();
 
   // Same as above but uses WindowControllerList instead of BrowserList.
   extensions::WindowController* GetExtensionWindowController();
 
   // Gets the "current" web contents if any. If there is no associated web
   // contents then defaults to the foremost one.
-  virtual content::WebContents* GetAssociatedWebContents() override;
+  content::WebContents* GetAssociatedWebContents() override;
 
  protected:
-  virtual ~ChromeUIThreadExtensionFunction();
+  ~ChromeUIThreadExtensionFunction() override;
 };
 
 // A chrome specific analog to AsyncExtensionFunction. This has access to a
 // chrome Profile.
 //
 // DEPRECATED: Please consider inherting UIThreadExtensionFunction or
 // AsyncExtensionFunction directly. Then if you need access to Chrome details,
 // you can construct a ChromeExtensionFunctionDetails object within your
 // function implementation.
 class ChromeAsyncExtensionFunction : public ChromeUIThreadExtensionFunction {
  public:
   ChromeAsyncExtensionFunction();
 
  protected:
-  virtual ~ChromeAsyncExtensionFunction();
+  ~ChromeAsyncExtensionFunction() override;
 
   // Deprecated, see AsyncExtensionFunction::RunAsync.
   virtual bool RunAsync() = 0;
 
   // ValidationFailure override to match RunAsync().
   static bool ValidationFailure(ChromeAsyncExtensionFunction* function);
 
  private:
-  virtual ResponseAction Run() override;
+  ResponseAction Run() override;
 };
 
 // A chrome specific analog to SyncExtensionFunction. This has access to a
 // chrome Profile.
 //
 // DEPRECATED: Please consider inherting UIThreadExtensionFunction or
 // SyncExtensionFunction directly. Then if you need access to Chrome details,
 // you can construct a ChromeExtensionFunctionDetails object within your
 // function implementation.
 class ChromeSyncExtensionFunction : public ChromeUIThreadExtensionFunction {
  public:
   ChromeSyncExtensionFunction();
 
  protected:
-  virtual ~ChromeSyncExtensionFunction();
+  ~ChromeSyncExtensionFunction() override;
 
   // Deprecated, see SyncExtensionFunction::RunSync.
   virtual bool RunSync() = 0;
 
   // ValidationFailure override to match RunSync().
   static bool ValidationFailure(ChromeSyncExtensionFunction* function);
 
  private:
-  virtual ResponseAction Run() override;
+  ResponseAction Run() override;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_CHROME_EXTENSION_FUNCTION_H_