Use base::ResetAndReturn() in remoting.

remoting/client/plugin/chromoting_instance.cc

Index: remoting/client/plugin/chromoting_instance.cc
diff --git a/remoting/client/plugin/chromoting_instance.cc b/remoting/client/plugin/chromoting_instance.cc
index 9572bc401ba4921ef0d81f64ac6d267066106ff5..3faab96508cb0a30d58ea19e0c8a17d3bba03919 100644
--- a/remoting/client/plugin/chromoting_instance.cc
+++ b/remoting/client/plugin/chromoting_instance.cc
@@ -14,6 +14,7 @@
 
 #include "base/bind.h"
 #include "base/callback.h"
+#include "base/callback_helpers.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/lazy_instance.h"
@@ -905,8 +906,7 @@ void ChromotingInstance::HandleOnPinFetched(const base::DictionaryValue& data) {
     return;
   }
   if (!secret_fetched_callback_.is_null()) {
-    secret_fetched_callback_.Run(pin);
-    secret_fetched_callback_.Reset();
+    base::ResetAndReturn(&secret_fetched_callback_).Run(pin);
   } else {
     LOG(WARNING) << "Ignored OnPinFetched received without a pending fetch.";
   }