Convert Connect apptest to a unittest

mojo/shell/tests/BUILD.gn

 # Copyright 2016 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")
 import("//mojo/public/mojo_application_manifest.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 
 group("tests") {
   testonly = true
   deps = [
     ":apptests",
     ":mojo_shell_unittests",
+    "//mojo/shell/tests/connect",
   ]
 }
 
 source_set("test_support") {
   testonly = true
   sources = [
     "capability_filter_test.cc",
     "capability_filter_test.h",
   ]
 
@@ skipping 40 matching lines @@
   ]
 }
 
 mojo_native_application("apptests") {
   output_name = "mojo_shell_apptests"
   testonly = true
 
   deps = [
     "//mojo/shell/tests/application_manager",
   ]
-
-  data_deps = [
-    "//mojo/shell/tests/connect",
-  ]
 }