GN: Build rules and fixes for (almost) all mojo unittest targets

mojo/mojo_apps.gypi

 # 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.
 
 {
   'targets': [
     {
+      # GN version: //mojo/apps/js
+      #             //mojo/apps/js/bindings
+      #             //mojo/apps/js/bindings/gl
       'target_name': 'mojo_js_lib',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../gin/gin.gyp:gin',
         '../ui/gl/gl.gyp:gl',
         '../v8/tools/gyp/v8.gyp:v8',
         'mojo_base.gyp:mojo_common_lib',
         'mojo_base.gyp:mojo_environment_chromium',
         'mojo_base.gyp:mojo_gles2_bindings',
@@ skipping 30 matching lines @@
       ],
       'includes': [ 'public/tools/bindings/mojom_bindings_generator.gypi' ],
       'export_dependent_settings': [
         'mojo_base.gyp:mojo_cpp_bindings',
       ],
       'dependencies': [
         'mojo_base.gyp:mojo_cpp_bindings',
       ],
     },
     {
+      # GN version: //mojo/apps/js/test/mojo_apps_js_unittests
       'target_name': 'mojo_apps_js_unittests',
       'type': 'executable',
       'dependencies': [
         '../gin/gin.gyp:gin_test',
         'mojo_base.gyp:mojo_common_lib',
         'mojo_base.gyp:mojo_common_test_support',
         'mojo_base.gyp:mojo_public_test_interfaces',
         'mojo_base.gyp:mojo_run_all_unittests',
         'mojo_apps_js_bindings',
         'mojo_js_lib',
@@ skipping 29 matching lines @@
             'mojo_apps_js_unittests.isolate',
           ],
           'sources': [
             'mojo_apps_js_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }