replace OVERRIDE and FINAL with override and final in base/

base/threading/thread_unittest.cc

Index: base/threading/thread_unittest.cc
diff --git a/base/threading/thread_unittest.cc b/base/threading/thread_unittest.cc
index 8bd817c75bcda1d7d5b867b40bb5effc74fca445..2bac84a697cd8c4ab4adc29f66c2be74cdbc97d7 100644
--- a/base/threading/thread_unittest.cc
+++ b/base/threading/thread_unittest.cc
@@ -35,7 +35,7 @@ class SleepInsideInitThread : public Thread {
     Stop();
   }
 
-  virtual void Init() OVERRIDE {
+  virtual void Init() override {
     base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(500));
     init_called_ = true;
   }
@@ -74,11 +74,11 @@ class CaptureToEventList : public Thread {
     Stop();
   }
 
-  virtual void Init() OVERRIDE {
+  virtual void Init() override {
     event_list_->push_back(THREAD_EVENT_INIT);
   }
 
-  virtual void CleanUp() OVERRIDE {
+  virtual void CleanUp() override {
     event_list_->push_back(THREAD_EVENT_CLEANUP);
   }
 
@@ -97,7 +97,7 @@ class CapturingDestructionObserver
   }
 
   // DestructionObserver implementation:
-  virtual void WillDestroyCurrentMessageLoop() OVERRIDE {
+  virtual void WillDestroyCurrentMessageLoop() override {
     event_list_->push_back(THREAD_EVENT_MESSAGE_LOOP_DESTROYED);
     event_list_ = NULL;
   }