Implementation and fixes for Blimp client/engine E2E communication.

blimp/net/null_blimp_message_processor.cc

Index: blimp/net/null_blimp_message_processor.cc
diff --git a/blimp/net/null_blimp_message_processor.cc b/blimp/net/null_blimp_message_processor.cc
index 4ae26a3dba252184d4ec4f33b319322c4a7dc8b7..3b335ac0d85f22bc03e2e7de83ba073582d8f9ac 100644
--- a/blimp/net/null_blimp_message_processor.cc
+++ b/blimp/net/null_blimp_message_processor.cc
@@ -4,6 +4,8 @@
 
 #include "blimp/net/null_blimp_message_processor.h"
 
+#include "blimp/net/common.h"
+
 namespace blimp {
 
 NullBlimpMessageProcessor::~NullBlimpMessageProcessor() {}
@@ -11,6 +13,7 @@ NullBlimpMessageProcessor::~NullBlimpMessageProcessor() {}
 void NullBlimpMessageProcessor::ProcessMessage(
     scoped_ptr<BlimpMessage> message,
     const net::CompletionCallback& callback) {
+  DVLOG(2) << "Dropped message: " << *message;
   if (!callback.is_null())
     callback.Run(net::OK);
 }