GN build rules for all unit test targets in mojo/

mojo/shell/BUILD.gn

 # Copyright 2014 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/tools/bindings/mojom.gni")
 import("//build/config/ui.gni")
 
 executable("mojo_shell") {
   deps = [
     ":lib",
@@ skipping 146 matching lines @@
     "shell_test_main.cc",
   ]
 
   if (is_android) {
     deps += [
       # TODO(GYP):
       #'../testing/android/native_test.gyp:native_test_native_code',
     ]
   }
 }
+
+# GYP version: mojo/mojo.gyp:mojo_shell_test_support
+source_set("test_support") {
+  sources = [
+    "shell_test_helper.cc",
+    "shell_test_helper.h",
+  ]
+
+  deps = [
+    ":lib",
+    "//base",
+    "//base:base_static",
+    "//mojo/application_manager",
+    "//mojo/system",
+    "//url",
+  ]
+}