Convert Pass()→std::move() in //net

net/test/embedded_test_server/embedded_test_server_unittest.cc

Index: net/test/embedded_test_server/embedded_test_server_unittest.cc
diff --git a/net/test/embedded_test_server/embedded_test_server_unittest.cc b/net/test/embedded_test_server/embedded_test_server_unittest.cc
index 03061e440cf20465b235cf47ce70e3629a3f1f60..a08d3b7e25416ed1057f4477837dbb3547b5066a 100644
--- a/net/test/embedded_test_server/embedded_test_server_unittest.cc
+++ b/net/test/embedded_test_server/embedded_test_server_unittest.cc
@@ -4,6 +4,8 @@
 
 #include "net/test/embedded_test_server/embedded_test_server.h"
 
+#include <utility>
+
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/path_service.h"
@@ -178,7 +180,7 @@ class EmbeddedTestServerTest
       http_response->set_code(code);
       http_response->set_content(content);
       http_response->set_content_type(content_type);
-      return http_response.Pass();
+      return std::move(http_response);
     }
 
     return nullptr;