replace OVERRIDE and FINAL with override and final in base/

base/message_loop/message_loop_proxy_impl_unittest.cc

Index: base/message_loop/message_loop_proxy_impl_unittest.cc
diff --git a/base/message_loop/message_loop_proxy_impl_unittest.cc b/base/message_loop/message_loop_proxy_impl_unittest.cc
index 81c9b0c51ba057b29798137779442ac919385f91..5f31140303f91d439aa5cd61bb9793de4ac31d7b 100644
--- a/base/message_loop/message_loop_proxy_impl_unittest.cc
+++ b/base/message_loop/message_loop_proxy_impl_unittest.cc
@@ -38,14 +38,14 @@ class MessageLoopProxyImplTest : public testing::Test {
   }
 
  protected:
-  virtual void SetUp() OVERRIDE {
+  virtual void SetUp() override {
     io_thread_.reset(new Thread("MessageLoopProxyImplTest_IO"));
     file_thread_.reset(new Thread("MessageLoopProxyImplTest_File"));
     io_thread_->Start();
     file_thread_->Start();
   }
 
-  virtual void TearDown() OVERRIDE {
+  virtual void TearDown() override {
     io_thread_->Stop();
     file_thread_->Stop();
   }