Converted Mojo Common Unittests to run as Apptests.

mojo/data_pipe_utils/BUILD.gn

 # 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/mojo_application.gni")
+
 source_set("data_pipe_utils") {
   sources = [
     "data_pipe_drainer.cc",
     "data_pipe_drainer.h",
     "data_pipe_file_utils.cc",
     "data_pipe_utils.cc",
     "data_pipe_utils.h",
     "data_pipe_utils_internal.h",
   ]
 
   if (is_nacl) {
     sources -= [ "data_pipe_file_utils.cc" ]
   }
 
   deps = [
     "//base",
     "//mojo/message_pump",
     "//mojo/public/cpp/environment:environment",
   ]
 
   public_deps = [
     "//mojo/public/cpp/system",
   ]
 }
 
-source_set("tests") {
+mojo_native_application("mojo_data_pipe_utils_apptests") {
   testonly = true
 
   sources = [
     "data_pipe_utils_unittest.cc",
   ]
 
   deps = [
     ":data_pipe_utils",
     "//base",
+    "//mojo/application",
+    "//mojo/application:test_support",
     "//testing/gtest",
   ]
 }