Cleanup: use std::make_unique in clone()

Change-Id: I19cba18d77993e215a451417142330bde7523bd7
Reviewed-on: http://review.couchbase.org/104346
Reviewed-by: Dave Rigby <[email protected]>
Tested-by: Build Bot <[email protected]>

Author: trondn

protocol/connection/client_connection.cc

@@ -666,13 +666,13 @@ static Frame to_frame(const BinprotCommand& command) {
 }
 
 std::unique_ptr<MemcachedConnection> MemcachedConnection::clone() {
-    auto* result = new MemcachedConnection(
+    auto result = std::make_unique<MemcachedConnection>(
             this->host, this->port, this->family, this->ssl);
     result->setSslCertFile(this->ssl_cert_file);
     result->setSslKeyFile(this->ssl_key_file);
     result->connect();
     result->applyFeatures("", this->effective_features);
-    return std::unique_ptr<MemcachedConnection>{result};
+    return result;
 }
 
 void MemcachedConnection::recvFrame(Frame& frame) {