Apply gn format with 'sources' sorting to src/

third_party/mojo/src/mojo/edk/system/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("../mojo_edk.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
@@ skipping 176 matching lines @@
     "//base/test:test_support",
     "//testing/gtest",
   ]
 
   allow_circular_includes_from = [ "../embedder:embedder_unittests" ]
 }
 
 test("mojo_message_pipe_perftests") {
   sources = [
     "message_pipe_perftest.cc",
+    "message_pipe_test_utils.cc",
     "message_pipe_test_utils.h",
-    "message_pipe_test_utils.cc",
   ]
 
   deps = [
     ":system",
     ":test_utils",
     "../test:test_support",
     "//base",
     "//base/test:test_support",
     "//base/test:test_support_perf",
     "//testing/gtest",
   ]
 }