Use base::ResetAndReturn() in remoting.

remoting/protocol/fake_datagram_socket.cc

Index: remoting/protocol/fake_datagram_socket.cc
diff --git a/remoting/protocol/fake_datagram_socket.cc b/remoting/protocol/fake_datagram_socket.cc
index 75a50b39a74af4b0b4c315443877a0c7c683168a..9bd4ede48b336e0356aebfa8b7342676f68dd1cc 100644
--- a/remoting/protocol/fake_datagram_socket.cc
+++ b/remoting/protocol/fake_datagram_socket.cc
@@ -5,6 +5,7 @@
 #include "remoting/protocol/fake_datagram_socket.h"
 
 #include "base/bind.h"
+#include "base/callback_helpers.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "net/base/address_list.h"
@@ -36,9 +37,7 @@ void FakeDatagramSocket::AppendInputPacket(const std::string& data) {
     int result = CopyReadData(read_buffer_.get(), read_buffer_size_);
     read_buffer_ = nullptr;
 
-    net::CompletionCallback callback = read_callback_;
-    read_callback_.Reset();
-    callback.Run(result);
+    base::ResetAndReturn(&read_callback_).Run(result);
   }
 }