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

base/tools_sanity_unittest.cc

Index: base/tools_sanity_unittest.cc
diff --git a/base/tools_sanity_unittest.cc b/base/tools_sanity_unittest.cc
index 00eecb420cd05ed6aa1b13db97637a77bd360472..dfd9dab88f332c22740303a5b610143465a57411 100644
--- a/base/tools_sanity_unittest.cc
+++ b/base/tools_sanity_unittest.cc
@@ -239,7 +239,7 @@ class TOOLS_SANITY_TEST_CONCURRENT_THREAD : public PlatformThread::Delegate {
  public:
   explicit TOOLS_SANITY_TEST_CONCURRENT_THREAD(bool *value) : value_(value) {}
   virtual ~TOOLS_SANITY_TEST_CONCURRENT_THREAD() {}
-  virtual void ThreadMain() OVERRIDE {
+  void ThreadMain() override {
     *value_ = true;
 
     // Sleep for a few milliseconds so the two threads are more likely to live
@@ -255,7 +255,7 @@ class ReleaseStoreThread : public PlatformThread::Delegate {
  public:
   explicit ReleaseStoreThread(base::subtle::Atomic32 *value) : value_(value) {}
   virtual ~ReleaseStoreThread() {}
-  virtual void ThreadMain() OVERRIDE {
+  void ThreadMain() override {
     base::subtle::Release_Store(value_, kMagicValue);
 
     // Sleep for a few milliseconds so the two threads are more likely to live
@@ -271,7 +271,7 @@ class AcquireLoadThread : public PlatformThread::Delegate {
  public:
   explicit AcquireLoadThread(base::subtle::Atomic32 *value) : value_(value) {}
   virtual ~AcquireLoadThread() {}
-  virtual void ThreadMain() OVERRIDE {
+  void ThreadMain() override {
     // Wait for the other thread to make Release_Store
     PlatformThread::Sleep(TimeDelta::FromMilliseconds(100));
     base::subtle::Acquire_Load(value_);