Add remaining trivial targets for the Linux GN build

chrome/chrome_tests_unit.gypi

 # Copyright 2012 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.
 {
   'variables': {
     'chrome_unit_tests_sources': [
       '../components/autofill/content/renderer/test_password_autofill_agent.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.h',
       '../components/autofill/content/renderer/test_password_generation_agent.cc',
       '../components/autofill/content/renderer/test_password_generation_agent.h',
@@ skipping 2587 matching lines @@
         }],
         ['enable_plugin_installation==0', {
           'sources!': [
             'browser/plugins/plugin_installer_unittest.cc',
           ],
         }],
         # Adding more conditions? Don't forget to update the GN build.
       ],
     },
     {
+      # GN: //chrome/test:chrome_app_unittests
       'target_name': 'chrome_app_unittests',
       'type': 'executable',
       'dependencies': [
         # unit tests should only depend on
         # 1) everything that the chrome binaries depend on:
         '<@(chromium_browser_dependencies)',
         '<@(chromium_child_dependencies)',
         '../content/content.gyp:content_app_both',
         # 2) test-specific support libraries:
         '../base/base.gyp:run_all_unittests',
@@ skipping 131 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }