Mojo: MOJO_OVERRIDE -> override in mojo/.

mojo/public/cpp/utility/tests/mutex_unittest.cc

Index: mojo/public/cpp/utility/tests/mutex_unittest.cc
diff --git a/mojo/public/cpp/utility/tests/mutex_unittest.cc b/mojo/public/cpp/utility/tests/mutex_unittest.cc
index 6a7a8361fa967476ca2c3f983be167f578408688..eb5a3300cbbab47b5f752e09da1abaa1f61afcd5 100644
--- a/mojo/public/cpp/utility/tests/mutex_unittest.cc
+++ b/mojo/public/cpp/utility/tests/mutex_unittest.cc
@@ -114,9 +114,7 @@ class FiddlerThread : public Thread {
     delete fiddler_;
   }
 
-  virtual void Run() MOJO_OVERRIDE {
-    fiddler_->Fiddle();
-  }
+  virtual void Run() override { fiddler_->Fiddle(); }
 
  private:
   Fiddler* const fiddler_;
@@ -170,7 +168,7 @@ class TryThread : public Thread {
   explicit TryThread(Mutex* mutex) : mutex_(mutex), try_lock_succeeded_() {}
   virtual ~TryThread() {}
 
-  virtual void Run() MOJO_OVERRIDE {
+  virtual void Run() override {
     try_lock_succeeded_ = mutex_->TryLock();
     if (try_lock_succeeded_)
       mutex_->Unlock();