Make a mojo:apptests GN meta-target, add apptests.

BUILD.gn

 # Copyright (c) 2013 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.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
@@ skipping 666 matching lines @@
       "//device/battery:mojo_bindings_dart",
       "//device/vibration:mojo_bindings_dart",
       "//device/vibration:mojo_bindings_python",
       "//ipc/mojo:ipc_mojo_perftests",
       "//ipc/mojo:client_channel_dart",
       "//ipc/mojo:client_channel_python",
       "//media/mojo/interfaces:interfaces_dart",
       "//media/mojo/interfaces:interfaces_python",
       "//media/mojo/services:cdm_service",
       "//media/mojo:tests",
+      "//mojo:apptests",
       "//net/interfaces:interfaces_dart",
       "//net/interfaces:interfaces_python",
       "//third_party/mojo/src/mojo/edk/js/test:js_integration_tests",
       "//third_party/mojo/src/mojo/edk/js/tests:js_to_cpp_bindings_dart",
       "//third_party/mojo/src/mojo/edk/js/tests:js_to_cpp_bindings_python",
       "//third_party/mojo/src/mojo/public/python:packaged_application",
       "//third_party/mojo/src/mojo/public/python:packaged_bindings",
       "//third_party/mojo/src/mojo/public/cpp/application:test_support_standalone",
       "//third_party/mojo_services/src/accessibility/public/interfaces:interfaces_dart",
       "//third_party/mojo_services/src/accessibility/public/interfaces:interfaces_python",
       "//third_party/mojo_services/src/window_manager/public/interfaces:interfaces_dart",
       "//third_party/mojo_services/src/window_manager/public/interfaces:interfaces_python",
     ]
 
-    if (!is_debug) {
-      deps += [
-        "//mojo/services/html_viewer:apptests",
-        "//mojo/services/html_viewer:tests",
-        "//mojo/services/network:apptests",
-      ]
+    if (!is_component_build) {
+      deps += [ "//mojo/services/html_viewer:tests" ]
     }
   }
 }
 
 group("gn_visibility") {
   deps = [
     # "//build/config/sanitizers:options_sources",
     # "//third_party/pdfium:pdfium_embeddertests",  # TODO(GYP): visibility?
     # "//third_party/pdfium:pdfium_unittests",  # TODO(GYP): visibility?
     # "//ui/resources:repack_ui_test_mac_locale_pack",
@@ skipping 64 matching lines @@
 
       # Note:
       # (*) Fails but failures match GYP build at time of testing.
     ]
 
     if (enable_nacl) {
       deps += [ "//components/nacl:nacl_loader_unittests" ]  # PASSES 3/28/2015
     }
   }
 }