Add basic perf tests for chromoting protocol.

remoting/protocol/channel_multiplexer.cc

 // Copyright (c) 2012 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 "remoting/protocol/channel_multiplexer.h"
 
 #include <string.h>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 464 matching lines @@
 
 void ChannelMultiplexer::NotifyWriteFailed(const std::string& name) {
   std::map<std::string, MuxChannel*>::iterator it = channels_.find(name);
   if (it != channels_.end()) {
     it->second->OnWriteFailed();
   }
 }
 
 void ChannelMultiplexer::OnIncomingPacket(scoped_ptr<MultiplexPacket> packet,
                                           const base::Closure& done_task) {
+  DCHECK(packet->has_channel_id());
   if (!packet->has_channel_id()) {
     LOG(ERROR) << "Received packet without channel_id.";
     done_task.Run();
     return;
   }
 
   int receive_id = packet->channel_id();
   MuxChannel* channel = NULL;
   std::map<int, MuxChannel*>::iterator it =
       channels_by_receive_id_.find(receive_id);
@@ skipping 15 matching lines @@
   channel->OnIncomingPacket(packet.Pass(), done_task);
 }
 
 bool ChannelMultiplexer::DoWrite(scoped_ptr<MultiplexPacket> packet,
                                  const base::Closure& done_task) {
   return writer_.Write(SerializeAndFrameMessage(*packet), done_task);
 }
 
 }  // namespace protocol
 }  // namespace remoting