Fix remaining incompatibilities between scoped_ptr and unique_ptr.

remoting/host/native_messaging/native_messaging_reader.cc

Index: remoting/host/native_messaging/native_messaging_reader.cc
diff --git a/remoting/host/native_messaging/native_messaging_reader.cc b/remoting/host/native_messaging/native_messaging_reader.cc
index ffb553e909c0aa2cbb577b436d820a1090dd00d8..f5cbb87fba3db8cb44fc16f04068024a195d1eff 100644
--- a/remoting/host/native_messaging/native_messaging_reader.cc
+++ b/remoting/host/native_messaging/native_messaging_reader.cc
@@ -115,7 +115,7 @@ void NativeMessagingReader::Core::ReadMessage() {
 
     scoped_ptr<base::Value> message = base::JSONReader::Read(message_json);
     if (!message) {
-      LOG(ERROR) << "Failed to parse JSON message: " << message;
+      LOG(ERROR) << "Failed to parse JSON message: " << message.get();
       NotifyEof();
       return;
     }