GN: Format more gn files

utils/invoke_dart.gni

 # Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 _dart_root = rebase_path("..")
 
 template("invoke_dart") {
   assert(defined(invoker.outputs), "invoke_dart must specify outputs")
   extra_deps = []
   if (defined(invoker.deps)) {
     extra_deps += invoker.deps
   }
 
   extra_inputs = []
   if (defined(invoker.inputs)) {
     extra_inputs += invoker.inputs
   }
 
   extra_args = []
   if (defined(invoker.args)) {
     extra_args += invoker.args
   }
 
   action(target_name) {
     relative_dart_root = rebase_path(_dart_root, ".")
-    deps = extra_deps + [
-      "$relative_dart_root/runtime/bin:dart($host_toolchain)",
-    ]
+    deps =
+        extra_deps + [ "$relative_dart_root/runtime/bin:dart($host_toolchain)" ]
 
-    dart_out_dir = get_label_info(
-        "$relative_dart_root/runtime/bin:dart($host_toolchain)", "root_out_dir")
+    dart_out_dir =
+        get_label_info("$relative_dart_root/runtime/bin:dart($host_toolchain)",
+                       "root_out_dir")
     if (is_win) {
       dart = rebase_path("$dart_out_dir/dart.exe")
     } else {
       dart = rebase_path("$dart_out_dir/dart")
     }
 
-    inputs = [
-      dart,
-    ] + extra_inputs
+    inputs = [ dart ] + extra_inputs
 
     outputs = invoker.outputs
 
     script = "$_dart_root/tools/dart_for_gn.py"
-    args = [
-      dart,
-    ] + extra_args
+    args = [ dart ] + extra_args
   }
 }
 
 template("application_snapshot") {
   assert(defined(invoker.main_dart), "Must specify 'main_dart'")
   assert(defined(invoker.training_args), "Must specify 'training_args'")
   main_dart = invoker.main_dart
   training_args = invoker.training_args
   name = target_name
   if (defined(invoker.name)) {
     name = invoker.name
   }
   extra_deps = []
   if (defined(invoker.deps)) {
     extra_deps += invoker.deps
   }
   extra_inputs = []
   if (defined(invoker.inputs)) {
     extra_inputs += invoker.inputs
   }
   invoke_dart(target_name) {
-    deps = extra_deps + [
-      "$_dart_root/pkg:pkg_files_stamp"
-    ]
+    deps = extra_deps + [ "$_dart_root/pkg:pkg_files_stamp" ]
 
     inputs = extra_inputs + [
-      "$_dart_root/sdk/lib/_internal/sdk_library_metadata/lib/libraries.dart",
-      "$root_gen_dir/pkg_files.stamp",
-    ]
+               "$_dart_root/sdk/lib/_internal/sdk_library_metadata/lib/libraries.dart",
+               "$root_gen_dir/pkg_files.stamp",
+             ]
 
     output = "$root_gen_dir/$name.dart.snapshot"
     outputs = [
       output,
     ]
 
     dot_packages = rebase_path("$_dart_root/.packages")
     abs_output = rebase_path(output)
     main_file = rebase_path(main_dart)
 
     args = [
-      "--packages=$dot_packages",
-      "--snapshot=$abs_output",
-      "--snapshot-kind=app-jit",
-      main_file,
-    ] + training_args
+             "--packages=$dot_packages",
+             "--snapshot=$abs_output",
+             "--snapshot-kind=app-jit",
+             main_file,
+           ] + training_args
   }
 }