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

base/synchronization/lock_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/synchronization/lock.h"
 
 #include <stdlib.h>
 
 #include "base/compiler_specific.h"
 #include "base/threading/platform_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 // Basic test to make sure that Acquire()/Release()/Try() don't crash ----------
 
 class BasicLockTestThread : public PlatformThread::Delegate {
  public:
   explicit BasicLockTestThread(Lock* lock) : lock_(lock), acquired_(0) {}
 
-  virtual void ThreadMain() OVERRIDE {
+  void ThreadMain() override {
     for (int i = 0; i < 10; i++) {
       lock_->Acquire();
       acquired_++;
       lock_->Release();
     }
     for (int i = 0; i < 10; i++) {
       lock_->Acquire();
       acquired_++;
       PlatformThread::Sleep(TimeDelta::FromMilliseconds(rand() % 20));
       lock_->Release();
@@ skipping 54 matching lines @@
   EXPECT_GE(acquired, 20);
   EXPECT_GE(thread.acquired(), 20);
 }
 
 // Test that Try() works as expected -------------------------------------------
 
 class TryLockTestThread : public PlatformThread::Delegate {
  public:
   explicit TryLockTestThread(Lock* lock) : lock_(lock), got_lock_(false) {}
 
-  virtual void ThreadMain() OVERRIDE {
+  void ThreadMain() override {
     got_lock_ = lock_->Try();
     if (got_lock_)
       lock_->Release();
   }
 
   bool got_lock() const { return got_lock_; }
 
  private:
   Lock* lock_;
   bool got_lock_;
@@ skipping 48 matching lines @@
   static void DoStuff(Lock* lock, int* value) {
     for (int i = 0; i < 40; i++) {
       lock->Acquire();
       int v = *value;
       PlatformThread::Sleep(TimeDelta::FromMilliseconds(rand() % 10));
       *value = v + 1;
       lock->Release();
     }
   }
 
-  virtual void ThreadMain() OVERRIDE {
-    DoStuff(lock_, value_);
-  }
+  void ThreadMain() override { DoStuff(lock_, value_); }
 
  private:
   Lock* lock_;
   int* value_;
 
   DISALLOW_COPY_AND_ASSIGN(MutexLockTestThread);
 };
 
 TEST(LockTest, MutexTwoThreads) {
   Lock lock;
@@ skipping 29 matching lines @@
   MutexLockTestThread::DoStuff(&lock, &value);
 
   PlatformThread::Join(handle1);
   PlatformThread::Join(handle2);
   PlatformThread::Join(handle3);
 
   EXPECT_EQ(4 * 40, value);
 }
 
 }  // namespace base