Replacing the OVERRIDE with override and FINAL with final in gpu

gpu/command_buffer/client/buffer_tracker_unittest.cc

Index: gpu/command_buffer/client/buffer_tracker_unittest.cc
diff --git a/gpu/command_buffer/client/buffer_tracker_unittest.cc b/gpu/command_buffer/client/buffer_tracker_unittest.cc
index f6174c0802b3d9681d52a58e929173c33591e8b8..39ff633f6a57f6a7d4080307f2345e30bc05b727 100644
--- a/gpu/command_buffer/client/buffer_tracker_unittest.cc
+++ b/gpu/command_buffer/client/buffer_tracker_unittest.cc
@@ -26,7 +26,7 @@ class MockClientCommandBufferImpl : public MockClientCommandBuffer {
   virtual ~MockClientCommandBufferImpl() {}
 
   virtual scoped_refptr<gpu::Buffer> CreateTransferBuffer(size_t size,
-                                                          int32* id) OVERRIDE {
+                                                          int32* id) override {
     if (context_lost_) {
       *id = -1;
       return NULL;