[WIP] Add DCHECK for mojo::edk::Init().

services/ui/common/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("//build/config/ui.gni")
 import("//services/service_manager/public/service_manifest.gni")
 import("//testing/test.gni")
 
 source_set("mus_common") {
   sources = [
@@ skipping 49 matching lines @@
 source_set("run_all_service_tests") {
   testonly = true
 
   sources = [
     "run_all_service_tests.cc",
   ]
 
   deps = [
     "//base/test:test_support",
     "//mojo/edk/system",
+    "//mojo/edk/test:test_support",
     "//services/service_manager/background:main",
   ]
 
   if (use_ozone) {
     deps += [ "//ui/ozone" ]
   }
 }
 
 source_set("task_runner_test_base") {
   testonly = true
 
   sources = [
     "task_runner_test_base.cc",
     "task_runner_test_base.h",
   ]
 
   deps = [
     "//base",
     "//base/test:test_support",
     "//testing/gtest",
   ]
 }