Fix remoting NM hosts to verify that incoming messages are dictionaries.

remoting/host/native_messaging/pipe_messaging_channel.cc

Index: remoting/host/native_messaging/pipe_messaging_channel.cc
diff --git a/remoting/host/native_messaging/pipe_messaging_channel.cc b/remoting/host/native_messaging/pipe_messaging_channel.cc
index 0f3fe110ba3d481657f61c3bc1f2b015ba42f83e..399bfa8aa9ae1fe795e70703309d747473ed0c63 100644
--- a/remoting/host/native_messaging/pipe_messaging_channel.cc
+++ b/remoting/host/native_messaging/pipe_messaging_channel.cc
@@ -72,12 +72,6 @@ void PipeMessagingChannel::Start(EventHandler* event_handler) {
 void PipeMessagingChannel::ProcessMessage(scoped_ptr<base::Value> message) {
   DCHECK(CalledOnValidThread());
 
-  if (message->GetType() != base::Value::TYPE_DICTIONARY) {
-    LOG(ERROR) << "Expected DictionaryValue";
-    Shutdown();
-    return;
-  }
-
   if (event_handler_)
     event_handler_->OnMessage(message.Pass());
 }