replace OVERRIDE and FINAL with override and final in base/

BUG=417463

Review URL: https://codereview.chromium.org/611153004

Cr-Commit-Position: refs/heads/master@{#298520}


CrOS-Libchrome-Original-Commit: 9e096de10e6fdcafde67df469ed9a6b8b156dfb1
diff --git a/base/files/file_proxy_unittest.cc b/base/files/file_proxy_unittest.cc
index 2c62fa9..0034a1c 100644
--- a/base/files/file_proxy_unittest.cc
+++ b/base/files/file_proxy_unittest.cc
@@ -24,7 +24,7 @@
         bytes_written_(-1),
         weak_factory_(this) {}
 
-  virtual void SetUp() OVERRIDE {
+  virtual void SetUp() override {
     ASSERT_TRUE(dir_.CreateUniqueTempDir());
     ASSERT_TRUE(file_thread_.Start());
   }