[Blimp Net] Use checkpoitner

blimp/net/browser_connection_handler.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "blimp/net/browser_connection_handler.h"
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "blimp/net/blimp_connection.h"
 #include "blimp/net/blimp_message_checkpointer.h"
@@ skipping 33 matching lines @@
     scoped_ptr<BlimpConnection> connection) {
   DCHECK(connection);
   VLOG(1) << "HandleConnection " << connection.get();
 
   if (connection_) {
     DropCurrentConnection();
   }
   connection_ = std::move(connection);
 
   // Hook up message streams to the connection.
-  connection_->SetIncomingMessageProcessor(demultiplexer_.get());
+  connection_->SetIncomingMessageProcessor(checkpointer_.get());
   output_buffer_->SetOutputProcessor(
       connection_->GetOutgoingMessageProcessor());
   connection_->AddConnectionErrorObserver(this);
 }
 
 void BrowserConnectionHandler::OnConnectionError(int error) {
   DropCurrentConnection();
 }
 
 void BrowserConnectionHandler::DropCurrentConnection() {
   DCHECK(connection_);
   output_buffer_->SetOutputProcessor(nullptr);
   connection_.reset();
 }
 
 }  // namespace blimp