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

chrome/renderer/spellchecker/cocoa_spelling_engine_mac.h

Index: chrome/renderer/spellchecker/cocoa_spelling_engine_mac.h
diff --git a/chrome/renderer/spellchecker/cocoa_spelling_engine_mac.h b/chrome/renderer/spellchecker/cocoa_spelling_engine_mac.h
index 8e087e4f85bbcb9e32aea35450b5a92aa6135ff6..5cb09bc71f968ce38abf71cba7fdf86abe78e20c 100644
--- a/chrome/renderer/spellchecker/cocoa_spelling_engine_mac.h
+++ b/chrome/renderer/spellchecker/cocoa_spelling_engine_mac.h
@@ -10,12 +10,11 @@
 
 class CocoaSpellingEngine : public SpellingEngine {
  public:
-  virtual void Init(base::File bdict_file) override;
-  virtual bool InitializeIfNeeded() override;
-  virtual bool IsEnabled() override;
-  virtual bool CheckSpelling(const base::string16& word_to_check,
-                             int tag) override;
-  virtual void FillSuggestionList(
+  void Init(base::File bdict_file) override;
+  bool InitializeIfNeeded() override;
+  bool IsEnabled() override;
+  bool CheckSpelling(const base::string16& word_to_check, int tag) override;
+  void FillSuggestionList(
       const base::string16& wrong_word,
       std::vector<base::string16>* optional_suggestions) override;
 };