replace OVERRIDE and FINAL with override and final in chrome/browser/extensions/

chrome/browser/extensions/token_cache/token_cache_service.h

Index: chrome/browser/extensions/token_cache/token_cache_service.h
diff --git a/chrome/browser/extensions/token_cache/token_cache_service.h b/chrome/browser/extensions/token_cache/token_cache_service.h
index a533bbae11da51ba21d352819e975efbef2ec82f..c90e74a8466d569bc3b01ac7c847266dad341fea 100644
--- a/chrome/browser/extensions/token_cache/token_cache_service.h
+++ b/chrome/browser/extensions/token_cache/token_cache_service.h
@@ -39,7 +39,7 @@ class TokenCacheService : public KeyedService,
   std::string RetrieveToken(const std::string& token_name);
 
   // KeyedService:
-  virtual void Shutdown() OVERRIDE;
+  virtual void Shutdown() override;
 
  private:
   friend class TokenCacheTest;
@@ -47,7 +47,7 @@ class TokenCacheService : public KeyedService,
 
   // SigninManagerBase::Observer:
   virtual void GoogleSignedOut(const std::string& account_id,
-                               const std::string& username) OVERRIDE;
+                               const std::string& username) override;
 
   struct TokenCacheData {
     std::string token;