Don't use barcodes in ProtocolPerfTests

remoting/host/client_session.h

Index: remoting/host/client_session.h
diff --git a/remoting/host/client_session.h b/remoting/host/client_session.h
index 96e177fca209b03ed68e8b4b3bec1355a65eb8e4..5bdb97f53897237c03feb75693111f21770f6bdc 100644
--- a/remoting/host/client_session.h
+++ b/remoting/host/client_session.h
@@ -140,6 +140,10 @@ class ClientSession : public base::NonThreadSafe,
     return client_capabilities_.get();
   }
 
+  void SetEventTimestampsSourceForTests(
+      scoped_refptr<protocol::InputEventTimestampsSource>
+          event_timestamp_source);
+
  private:
   // Creates a proxy for sending clipboard events to the client.
   std::unique_ptr<protocol::ClipboardStub> CreateClipboardProxy();