Replace OVERRIDE->override and FINAL->final since we now require C++11.

test/unittests/libplatform/task-queue-unittest.cc

Index: test/unittests/libplatform/task-queue-unittest.cc
diff --git a/test/unittests/libplatform/task-queue-unittest.cc b/test/unittests/libplatform/task-queue-unittest.cc
index 9a186589f7bb8b7b3258cc700f897704984f0cf5..d6ddaa3b7e166c93cb1e0c93e027a44108d71fd8 100644
--- a/test/unittests/libplatform/task-queue-unittest.cc
+++ b/test/unittests/libplatform/task-queue-unittest.cc
@@ -21,12 +21,12 @@ struct MockTask : public Task {
 };
 
 
-class TaskQueueThread FINAL : public base::Thread {
+class TaskQueueThread final : public base::Thread {
  public:
   explicit TaskQueueThread(TaskQueue* queue)
       : Thread(Options("libplatform TaskQueueThread")), queue_(queue) {}
 
-  virtual void Run() OVERRIDE { EXPECT_THAT(queue_->GetNext(), IsNull()); }
+  virtual void Run() override { EXPECT_THAT(queue_->GetNext(), IsNull()); }
 
  private:
   TaskQueue* queue_;