Run gn format on all BUILD.gn files (gn version 306668)

examples/surfaces_app/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/public/mojo_application.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 group("surfaces_app") {
   deps = [
     ":child_app",
@@ skipping 27 matching lines @@
     "//mojo/services/public/interfaces/native_viewport",
   ]
 
   sources = [
     "embedder.cc",
     "embedder.h",
     "surfaces_app.cc",
   ]
 }
 
-
 mojo_native_application("child_app") {
   output_name = "surfaces_child_app"
 
   deps = [
     ":bindings",
     ":util",
     "//base",
     "//cc",
     "//cc/surfaces",
     "//cc/surfaces:surface_id",
@@ skipping 69 matching lines @@
   ]
 }
 
 mojom("bindings") {
   deps = [
     "//mojo/services/public/interfaces/geometry",
     "//mojo/services/public/interfaces/surfaces",
     "//mojo/services/public/interfaces/surfaces:surface_id",
   ]
 
-  sources = [ "child.mojom" ]
+  sources = [
+    "child.mojom",
+  ]
 }