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

base/threading/thread_collision_warner_unittest.cc

Index: base/threading/thread_collision_warner_unittest.cc
diff --git a/base/threading/thread_collision_warner_unittest.cc b/base/threading/thread_collision_warner_unittest.cc
index 48710a7f3cc508fe91c6389fe9b1b54ae246596a..9d93f351148e620b427cef4531b18fd4a97365b1 100644
--- a/base/threading/thread_collision_warner_unittest.cc
+++ b/base/threading/thread_collision_warner_unittest.cc
@@ -41,9 +41,7 @@ class AssertReporter : public base::AsserterBase {
   AssertReporter()
       : failed_(false) {}
 
-  virtual void warn() OVERRIDE {
-    failed_ = true;
-  }
+  void warn() override { failed_ = true; }
 
   virtual ~AssertReporter() {}
 
@@ -151,7 +149,7 @@ TEST(ThreadCollisionTest, MTBookCriticalSectionTest) {
     explicit QueueUser(NonThreadSafeQueue& queue)
         : queue_(queue) {}
 
-    virtual void Run() OVERRIDE {
+    void Run() override {
       queue_.push(0);
       queue_.pop();
     }
@@ -209,7 +207,7 @@ TEST(ThreadCollisionTest, MTScopedBookCriticalSectionTest) {
     explicit QueueUser(NonThreadSafeQueue& queue)
         : queue_(queue) {}
 
-    virtual void Run() OVERRIDE {
+    void Run() override {
       queue_.push(0);
       queue_.pop();
     }
@@ -270,7 +268,7 @@ TEST(ThreadCollisionTest, MTSynchedScopedBookCriticalSectionTest) {
         : queue_(queue),
           lock_(lock) {}
 
-    virtual void Run() OVERRIDE {
+    void Run() override {
       {
         base::AutoLock auto_lock(lock_);
         queue_.push(0);
@@ -344,7 +342,7 @@ TEST(ThreadCollisionTest, MTSynchedScopedRecursiveBookCriticalSectionTest) {
         : queue_(queue),
           lock_(lock) {}
 
-    virtual void Run() OVERRIDE {
+    void Run() override {
       {
         base::AutoLock auto_lock(lock_);
         queue_.push(0);