GN build rules for all unit test targets in mojo/

mojo/mojo.gyp

 # Copyright 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.
 
 {
   'target_defaults': {
     'conditions': [
       ['mojo_shell_debug_url != ""', {
         'defines': [
           'MOJO_SHELL_DEBUG=1',
@@ skipping 205 matching lines @@
           ],
         }, {  # use_aura==0
           'sources!': [
             'shell/view_manager_loader.cc',
             'shell/view_manager_loader.h',
           ],
         }],
       ],
     },
     {
+      # GN version: //mojo/shell:test_support
       'target_name': 'mojo_shell_test_support',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:base_static',
         '../url/url.gyp:url_lib',
         'mojo_application_manager',
         'mojo_base.gyp:mojo_system_impl',
         'mojo_shell_lib',
       ],
@@ skipping 210 matching lines @@
           'sources': [
             'dbus/dbus_external_service.h',
             'dbus/dbus_external_service.cc',
           ],
         },
       ],
     }],
     ['use_aura==1', {
       'targets': [
         {
+          # GN version: //mojo/aura
           'target_name': 'mojo_aura_support',
           'type': 'static_library',
           'dependencies': [
             '../cc/cc.gyp:cc',
             '../ui/aura/aura.gyp:aura',
             '../ui/compositor/compositor.gyp:compositor',
             '../ui/events/events.gyp:events',
             '../ui/events/events.gyp:events_base',
             '../ui/gl/gl.gyp:gl',
             '../webkit/common/gpu/webkit_gpu.gyp:webkit_gpu',
@@ skipping 58 matching lines @@
             'views/views_init_internal.h',
           ],
           'defines': [
             'MOJO_VIEWS_IMPLEMENTATION',
           ],
         },
       ],
     }],
   ],
 }