XXX test gn format everything

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" ]
 
   sources = [
     "channel_info_forward.h",
     "channel_init.cc",
     "channel_init.h",
     "configuration.h",
     "embedder.cc",
     "embedder.h",
     "embedder_internal.h",
     "entrypoints.cc",
+
     # Test-only code:
     # TODO(vtl): It's a little unfortunate that these end up in the same
     # component as non-test-only code. In the static build, this code should
     # hopefully be dead-stripped.
     "test_embedder.cc",
     "test_embedder.h",
   ]
 
   defines = [
     "MOJO_SYSTEM_IMPL_IMPLEMENTATION",
     "MOJO_SYSTEM_IMPLEMENTATION",
   ]
 
   configs += [ "//mojo/edk/system:system_config" ]
 
   public_deps = [
     ":platform",
     "//mojo/public/cpp/system",
   ]
 
-  deps = [ "//base" ]
+  deps = [
+    "//base",
+  ]
 }
 
 source_set("platform") {
   # This isn't really a standalone target; it must be linked into the
   # mojo_system_impl component.
   visibility = [
     ":embedder",
     "//mojo/edk/system",
   ]
 
@@ skipping 18 matching lines @@
     "simple_platform_shared_buffer_posix.cc",
     "simple_platform_shared_buffer_win.cc",
     "simple_platform_support.cc",
     "simple_platform_support.h",
   ]
 
   defines = [ "MOJO_SYSTEM_IMPL_IMPLEMENTATION" ]
 
   configs += [ "//mojo/edk/system:system_config" ]
 
-  deps = [ "//base" ]
+  deps = [
+    "//base",
+  ]
 }
 
 source_set("embedder_unittests") {
   testonly = true
   visibility = [ "//mojo/edk/system:mojo_system_unittests" ]
 
   sources = [
     "embedder_unittest.cc",
     "platform_channel_pair_posix_unittest.cc",
     "simple_platform_shared_buffer_unittest.cc",
   ]
 
   deps = [
     "//base",
     "//base/test:test_support",
     "//mojo/edk/test:test_support",
     "//mojo/edk/system",
     "//testing/gtest",
   ]
 }