Move code in src/remoting to the new callbacks.

remoting/protocol/util.cc

Index: remoting/protocol/util.cc
diff --git a/remoting/protocol/util.cc b/remoting/protocol/util.cc
index 9dfa016c1f38cec9ca1237a335d2e772f9fb56c9..080fcc38f2a9d655263ad946c28a67b7262e19ae 100644
--- a/remoting/protocol/util.cc
+++ b/remoting/protocol/util.cc
@@ -35,9 +35,5 @@ scoped_refptr<net::IOBufferWithSize> SerializeAndFrameMessage(
   return buffer;
 }
 
-Task* NewDeleteMessageTask(google::protobuf::MessageLite* message) {
-  return NewRunnableFunction(&DeleteMessage, message);
-}
-
 }  // namespace protocol
 }  // namespace remoting