replace OVERRIDE and FINAL with override and final in base/

base/time/time_unittest.cc

Index: base/time/time_unittest.cc
diff --git a/base/time/time_unittest.cc b/base/time/time_unittest.cc
index 63c3a1ac7718fe1cc5f0912b4af78f8d24a60627..d8f1e5efc5b8b84819192b2f72146c3ee567d1b5 100644
--- a/base/time/time_unittest.cc
+++ b/base/time/time_unittest.cc
@@ -22,7 +22,7 @@ using base::TimeTicks;
 // See also pr_time_unittests.cc
 class TimeTest : public testing::Test {
  protected:
-  virtual void SetUp() OVERRIDE {
+  virtual void SetUp() override {
     // Use mktime to get a time_t, and turn it into a PRTime by converting
     // seconds to microseconds.  Use 15th Oct 2007 12:45:00 local.  This
     // must be a time guaranteed to be outside of a DST fallback hour in