Chromecast: virtual/override cleanup.

chromecast/media/cma/ipc/media_message_fifo.cc

Index: chromecast/media/cma/ipc/media_message_fifo.cc
diff --git a/chromecast/media/cma/ipc/media_message_fifo.cc b/chromecast/media/cma/ipc/media_message_fifo.cc
index 9f8ad001dc89d0e4fc679386e0e9ec6abcf38884..2c93e846d0a089afca8101d58550c63b23b73e50 100644
--- a/chromecast/media/cma/ipc/media_message_fifo.cc
+++ b/chromecast/media/cma/ipc/media_message_fifo.cc
@@ -60,12 +60,12 @@ class FifoOwnedMemory : public MediaMemoryChunk {
   FifoOwnedMemory(void* data, size_t size,
                   const scoped_refptr<MediaMessageFlag>& flag,
                   const base::Closure& release_msg_cb);
-  virtual ~FifoOwnedMemory();
+  ~FifoOwnedMemory() override;
 
   // MediaMemoryChunk implementation.
-  virtual void* data() const override { return data_; }
-  virtual size_t size() const override { return size_; }
-  virtual bool valid() const override { return flag_->IsValid(); }
+  void* data() const override { return data_; }
+  size_t size() const override { return size_; }
+  bool valid() const override { return flag_->IsValid(); }
 
  private:
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;