Mojo: Convert OVERRIDE -> override in mojo/{embedder,system}.

mojo/system/local_message_pipe_endpoint.h

Index: mojo/system/local_message_pipe_endpoint.h
diff --git a/mojo/system/local_message_pipe_endpoint.h b/mojo/system/local_message_pipe_endpoint.h
index 76aee470154fa93b6ee1188757392e1b2fd4e24a..da38ba2830a4cb571d433f1c1fcf109610cd29b1 100644
--- a/mojo/system/local_message_pipe_endpoint.h
+++ b/mojo/system/local_message_pipe_endpoint.h
@@ -23,26 +23,26 @@ class MOJO_SYSTEM_IMPL_EXPORT LocalMessagePipeEndpoint
   virtual ~LocalMessagePipeEndpoint();
 
   // |MessagePipeEndpoint| implementation:
-  virtual Type GetType() const OVERRIDE;
-  virtual bool OnPeerClose() OVERRIDE;
-  virtual void EnqueueMessage(scoped_ptr<MessageInTransit> message) OVERRIDE;
+  virtual Type GetType() const override;
+  virtual bool OnPeerClose() override;
+  virtual void EnqueueMessage(scoped_ptr<MessageInTransit> message) override;
 
   // There's a dispatcher for |LocalMessagePipeEndpoint|s, so we have to
   // implement/override these:
-  virtual void Close() OVERRIDE;
-  virtual void CancelAllWaiters() OVERRIDE;
+  virtual void Close() override;
+  virtual void CancelAllWaiters() override;
   virtual MojoResult ReadMessage(UserPointer<void> bytes,
                                  UserPointer<uint32_t> num_bytes,
                                  DispatcherVector* dispatchers,
                                  uint32_t* num_dispatchers,
-                                 MojoReadMessageFlags flags) OVERRIDE;
-  virtual HandleSignalsState GetHandleSignalsState() const OVERRIDE;
+                                 MojoReadMessageFlags flags) override;
+  virtual HandleSignalsState GetHandleSignalsState() const override;
   virtual MojoResult AddWaiter(Waiter* waiter,
                                MojoHandleSignals signals,
                                uint32_t context,
-                               HandleSignalsState* signals_state) OVERRIDE;
+                               HandleSignalsState* signals_state) override;
   virtual void RemoveWaiter(Waiter* waiter,
-                            HandleSignalsState* signals_state) OVERRIDE;
+                            HandleSignalsState* signals_state) override;
 
   // This is only to be used by |MessagePipe|:
   MessageInTransitQueue* message_queue() { return &message_queue_; }