[PoC] Reformat all BUILD.gn and *.gni files with new gn.

mojo/edk/embedder/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.
 
 source_set("embedder") {
   # This isn't really a standalone target; it must be linked into the
   # mojo_system_impl component.
   visibility = [
     "//mojo/edk/system",
     "//components/nacl:nacl",
@@ skipping 117 matching lines @@
     "simple_platform_shared_buffer_unittest.cc",
   ]
 
   deps = [
     "//base",
     "//base/test:test_support",
     "//mojo/message_pump",
 
     # TODO(use_chrome_edk): temporary since the Mojo wrapper primitives are
     # declared in third party only for now.
-    "//third_party/mojo/src/mojo/edk/system",
     "//mojo/edk/system:test_utils",
     "//mojo/edk/test:test_support",
     "//testing/gtest",
+    "//third_party/mojo/src/mojo/edk/system",
 
     # TODO(use_chrome_edk): temporary since the Mojo wrapper primitives are
     # declared in third party only for now.
     "//third_party/mojo/src/mojo/edk/system",
   ]
 }