Dart: Reorganize files

services/dart/test/pingpong_target/BUILD.gn

Index: services/dart/test/pingpong_target/BUILD.gn
diff --git a/services/dart/test/pingpong_target/BUILD.gn b/services/dart/test/pingpong_target/BUILD.gn
deleted file mode 100644
index 86f595f155b5612073902b7197078c00d6131918..0000000000000000000000000000000000000000
--- a/services/dart/test/pingpong_target/BUILD.gn
+++ /dev/null
@@ -1,20 +0,0 @@
-# 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("//mojo/public/dart/rules.gni")
-
-dart_pkg("pingpong_target") {
-  apps = [ [
-        "dart_pingpong_target",
-        "lib/main.dart",
-      ] ]
-  sources = [
-    "pubspec.yaml",
-  ]
-  deps = [
-    "//mojo/dart/packages",
-    "//mojo/public/dart",
-    "//services/dart/test/dart/service_test_interfaces",
-  ]
-}