Make mojo/application:test_support a group target.

mojo/services/html_viewer/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("//testing/test.gni")
 import("//third_party/mojo/src/mojo/public/mojo.gni")
 import("//third_party/mojo/src/mojo/public/mojo_application.gni")
 import("//tools/grit/repack.gni")
 
 # Repack this here.
@@ skipping 212 matching lines @@
     "ax_provider_apptest.cc",
   ]
 
   deps = [
     ":lib",
     ":html_viewer",
     "//mojo/application:test_support",
     "//net:test_support",
     "//testing/gtest",
   ]
-
-  # TODO(msw): Move this to mojo/application:test_support; see crbug.com/477104.
-  data_deps = []
-  if (is_android) {
-    data_deps += [ "//mojo/android" ]
-  }
-  if (!is_component_build) {
-    data_deps += [ "//mojo/shell:mojo_shell" ]
-  }
 }