Add a 'gyp_only' GYP target for the GN migration.

build/gn_migration.gypi

 # Copyright (c) 2015 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 file defines three targets that we are using to
 # track the progress of the GYP->GN migration:
 #
 # If you run 'ninja gn_build gyp_remaining gyp_groups', and then
 # run 'ninja', the second ninja invocation should do nothing. This
 # indicates that everything built by a ninja build is in fact
@@ skipping 50 matching lines @@
         '../chrome/chrome.gyp:sync_integration_tests',
         '../chrome/chrome.gyp:sync_performance_tests',
         '../chrome/chrome.gyp:unit_tests',
         '../chrome/tools/profile_reset/jtl_compiler.gyp:jtl_compiler',
         '../components/components.gyp:network_hints_browser',
         '../components/components.gyp:policy_templates',
         '../components/components.gyp:webui_generator',
         '../components/components_tests.gyp:components_browsertests',
         '../components/components_tests.gyp:components_perftests',
         '../components/components_tests.gyp:components_unittests',
-        '../components/nacl.gyp:nacl_loader_unittests',
         '../content/content.gyp:content_app_browser',
         '../content/content.gyp:content_app_child',
         '../content/content_shell_and_tests.gyp:content_browsertests',
         '../content/content_shell_and_tests.gyp:content_gl_benchmark',
         '../content/content_shell_and_tests.gyp:content_gl_tests',
         '../content/content_shell_and_tests.gyp:content_perftests',
         '../content/content_shell_and_tests.gyp:content_shell',
         '../content/content_shell_and_tests.gyp:content_unittests',
         '../courgette/courgette.gyp:courgette',
         '../courgette/courgette.gyp:courgette_fuzz',
@@ skipping 99 matching lines @@
         '../url/url.gyp:url_unittests',
         '../v8/tools/gyp/v8.gyp:v8_snapshot',
         '../v8/tools/gyp/v8.gyp:postmortem-metadata',
       ],
       'conditions': [
         ['chromeos== 1 or use_ash==1', {
           'dependencies': [
             '../components/components.gyp:session_manager_component',
           ],
         }],
+        ['disable_nacl==0 and disable_nacl_untrusted==0', {
+          'dependencies': [
+            '../components/nacl.gyp:nacl_loader_unittests',
+          ]
+        }],
         ['enable_extensions==1 and OS!="mac"', {
           'dependencies': [
             '../extensions/shell/app_shell.gyp:app_shell',
             '../extensions/shell/app_shell.gyp:app_shell_unittests',
           ],
         }],
         ['OS!="win"', {
           'dependencies': [
             '../breakpad/breakpad.gyp:symupload',
           ],
@@ skipping 204 matching lines @@
           ],
         }],
         ['OS=="android" or OS=="linux"', {
           'dependencies': [
             '../net/net.gyp:disk_cache_memory_test',
           ],
         }],
       ],
     },
     {
+      'target_name': 'gyp_only',
+      'type': 'none',
+      'conditions': [
+        ['OS=="linux"', {
+          'conditions': [
+            ['disable_nacl==0 and disable_nacl_untrusted==0', {
+              'dependencies': [
+                '../mojo/mojo_nacl.gyp:monacl_shell',  # This should not be built in chromium.
+              ]
+            }],
+          ]
+        }],
+      ],
+    },
+    {
       'target_name': 'gyp_remaining',
       'type': 'none',
       'conditions': [
         ['OS=="linux"', {
           'dependencies': [
             '../cloud_print/cloud_print.gyp:cloud_print_unittests',
             '../third_party/webrtc/tools/tools.gyp:frame_analyzer',
             '../third_party/webrtc/tools/tools.gyp:rgba_to_i420_converter',
 
             # TODO(GYP) - list all of the examples explicitly.
             '../ppapi/ppapi_internal.gyp:*',
           ],
           'conditions': [
-            ['disable_nacl==0 and disable_nacl_untrusted==0', {
-              'dependencies': [
-                '../mojo/mojo_nacl.gyp:monacl_shell',  # TODO(GYP) This will be deleted; don't port
-                 '../remoting/remoting.gyp:remoting_key_tester',
-              ]
-            }],
             ['remoting==1', {
               'dependencies': [
                 '../remoting/app_remoting_webapp.gyp:ar_sample_app',
                 '../remoting/remoting.gyp:remoting_host',
                 '../remoting/remoting.gyp:remoting_it2me_native_messaging_host',
                 '../remoting/remoting.gyp:remoting_me2me_host',
                 '../remoting/remoting.gyp:remoting_me2me_native_messaging_host',
                 '../remoting/remoting.gyp:remoting_native_messaging_manifests',
                 '../remoting/remoting.gyp:remoting_perftests',
                 '../remoting/remoting.gyp:remoting_start_host',
               ],
+              'conditions': [
+                ['disable_nacl==0 and disable_nacl_untrusted==0', {
+                  'dependencies': [
+                    '../remoting/remoting.gyp:remoting_key_tester',
+                  ]
+                }],
+              ],
             }],
             ['test_isolation_mode!="noop"', {
               'dependencies': [
                 '../base/base.gyp:base_unittests_run',
                 '../cc/cc_tests.gyp:cc_unittests_run',
                 '../chrome/chrome.gyp:browser_tests_run',
                 '../chrome/chrome.gyp:chrome_run',
                 '../chrome/chrome.gyp:interactive_ui_tests_run',
                 '../chrome/chrome.gyp:sync_integration_tests_run',
                 '../chrome/chrome.gyp:unit_tests_run',
@@ skipping 42 matching lines @@
         'chromium_builder_perf',
         'chromium_builder_tests',
         'chromium_builder_webrtc',
         'chromium_gpu_builder',
         'chromium_gpu_debug_builder',
       ],
     },
   ]
 }