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

chrome/browser/extensions/blacklist_state_fetcher.cc

Index: chrome/browser/extensions/blacklist_state_fetcher.cc
diff --git a/chrome/browser/extensions/blacklist_state_fetcher.cc b/chrome/browser/extensions/blacklist_state_fetcher.cc
index bbb6523fd3c2875776c5ed98265f514af399b14b..df14b4a7312e1e74a30188a5f3d682c7c32af9ff 100644
--- a/chrome/browser/extensions/blacklist_state_fetcher.cc
+++ b/chrome/browser/extensions/blacklist_state_fetcher.cc
@@ -46,13 +46,13 @@ class BlacklistRequestContextGetter : public net::URLRequestContextGetter {
                             base::Bind(callback, context_getter));
   }
 
-  virtual net::URLRequestContext* GetURLRequestContext() OVERRIDE {
+  virtual net::URLRequestContext* GetURLRequestContext() override {
     DCHECK_CURRENTLY_ON(BrowserThread::IO);
     return url_request_context_.get();
   }
 
   virtual scoped_refptr<base::SingleThreadTaskRunner> GetNetworkTaskRunner()
-      const OVERRIDE {
+      const override {
     return network_task_runner_;
   }