Remove stl_util's deletion functions from remoting/.

remoting/protocol/channel_multiplexer.h

Index: remoting/protocol/channel_multiplexer.h
diff --git a/remoting/protocol/channel_multiplexer.h b/remoting/protocol/channel_multiplexer.h
index b14767b683427bfe8862882bf1029ec806646bce..16af179105db08a0e71d6cee68cd2108f3298c8e 100644
--- a/remoting/protocol/channel_multiplexer.h
+++ b/remoting/protocol/channel_multiplexer.h
@@ -5,6 +5,8 @@
 #ifndef REMOTING_PROTOCOL_CHANNEL_MULTIPLEXER_H_
 #define REMOTING_PROTOCOL_CHANNEL_MULTIPLEXER_H_
 
+#include <memory>
+
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "remoting/base/buffered_socket_writer.h"
@@ -72,7 +74,7 @@ class ChannelMultiplexer : public StreamChannelFactory {
   std::list<PendingChannel> pending_channels_;
 
   int next_channel_id_;
-  std::map<std::string, MuxChannel*> channels_;
+  std::map<std::string, std::unique_ptr<MuxChannel>> channels_;
 
   // Channels are added to |channels_by_receive_id_| only after we receive
   // receive_id from the remote peer.