replace 'virtual ... OVERRIDE' with '... override'

base/threading/simple_thread_unittest.cc

Index: base/threading/simple_thread_unittest.cc
diff --git a/base/threading/simple_thread_unittest.cc b/base/threading/simple_thread_unittest.cc
index a744b8d4588b8964997db73decd3f2b94b8df38c..ff737ee3d7d8745cb07a9102f6e1f29b21bd9b78 100644
--- a/base/threading/simple_thread_unittest.cc
+++ b/base/threading/simple_thread_unittest.cc
@@ -17,9 +17,7 @@ class SetIntRunner : public DelegateSimpleThread::Delegate {
   SetIntRunner(int* ptr, int val) : ptr_(ptr), val_(val) { }
   virtual ~SetIntRunner() { }
 
-  virtual void Run() OVERRIDE {
-    *ptr_ = val_;
-  }
+  void Run() override { *ptr_ = val_; }
 
  private:
   int* ptr_;
@@ -31,7 +29,7 @@ class WaitEventRunner : public DelegateSimpleThread::Delegate {
   explicit WaitEventRunner(WaitableEvent* event) : event_(event) { }
   virtual ~WaitEventRunner() { }
 
-  virtual void Run() OVERRIDE {
+  void Run() override {
     EXPECT_FALSE(event_->IsSignaled());
     event_->Signal();
     EXPECT_TRUE(event_->IsSignaled());
@@ -43,9 +41,7 @@ class WaitEventRunner : public DelegateSimpleThread::Delegate {
 class SeqRunner : public DelegateSimpleThread::Delegate {
  public:
   explicit SeqRunner(AtomicSequenceNumber* seq) : seq_(seq) { }
-  virtual void Run() OVERRIDE {
-    seq_->GetNext();
-  }
+  void Run() override { seq_->GetNext(); }
 
  private:
   AtomicSequenceNumber* seq_;
@@ -60,7 +56,7 @@ class VerifyPoolRunner : public DelegateSimpleThread::Delegate {
                    int total, WaitableEvent* event)
       : seq_(seq), total_(total), event_(event) { }
 
-  virtual void Run() OVERRIDE {
+  void Run() override {
     if (seq_->GetNext() == total_) {
       event_->Signal();
     } else {