Convert JsonWriter::Write to taking a const ref for the in-param

remoting/host/video_frame_recorder_host_extension.cc

Index: remoting/host/video_frame_recorder_host_extension.cc
diff --git a/remoting/host/video_frame_recorder_host_extension.cc b/remoting/host/video_frame_recorder_host_extension.cc
index 61bd74609d20c9a8d10ad32fc6962cfa54e378ca..efa110ea7c224bd83bcfb6bacc293e8597267a3f 100644
--- a/remoting/host/video_frame_recorder_host_extension.cc
+++ b/remoting/host/video_frame_recorder_host_extension.cc
@@ -159,7 +159,7 @@ void VideoFrameRecorderHostExtensionSession::OnNextFrame(
   // Note that JSONWriter::Write() can only fail due to invalid inputs, and will
   // DCHECK in Debug builds in that case.
   std::string reply_json;
-  if (!base::JSONWriter::Write(&reply_message, &reply_json)) {
+  if (!base::JSONWriter::Write(reply_message, &reply_json)) {
     return;
   }