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

chrome/browser/extensions/dev_mode_bubble_controller.h

Index: chrome/browser/extensions/dev_mode_bubble_controller.h
diff --git a/chrome/browser/extensions/dev_mode_bubble_controller.h b/chrome/browser/extensions/dev_mode_bubble_controller.h
index 4aaf1fef6f36962806e26acf635e2e38fdc4cea6..c350330df4cfca2ae1052cdfbe095f12571595f9 100644
--- a/chrome/browser/extensions/dev_mode_bubble_controller.h
+++ b/chrome/browser/extensions/dev_mode_bubble_controller.h
@@ -23,14 +23,14 @@ class DevModeBubbleController : public ExtensionMessageBubbleController {
   static bool IsDevModeExtension(const Extension* extension);
 
   explicit DevModeBubbleController(Profile* profile);
-  virtual ~DevModeBubbleController();
+  ~DevModeBubbleController() override;
 
   // Whether the controller knows of extensions to list in the bubble. Returns
   // true if so.
   bool ShouldShow();
 
   // ExtensionMessageBubbleController methods.
-  virtual void Show(ExtensionMessageBubble* bubble) override;
+  void Show(ExtensionMessageBubble* bubble) override;
 
  private:
   // A weak pointer to the profile we are associated with. Not owned by us.