gn format '.gni' files.

chrome/test/base/js2gtest.gni

 # Copyright 2015 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("//build_overrides/v8.gni")
 import("//v8/snapshot_toolchain.gni")
 
 # Variables:
 #   test_type: One of 'webui', 'unit' or 'extension' indicating what
 #       environment the test runs under.
@@ skipping 108 matching lines @@
       # The generator implicitly makes includes from these targets.
       "//chrome/test:test_support",
       "//testing/gmock",
       "//testing/gtest",
       "//url",
     ]
     if (defined(invoker.deps)) {
       deps += invoker.deps
     }
     if (defined(invoker.extra_js_files)) {
-      data_deps = [ ":$copy_target_name" ]
+      data_deps = [
+        ":$copy_target_name",
+      ]
     }
   }
 }