Build the Editor from GYP/build.py.

dart/dart.gyp

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'targets': [
     {
       'target_name': 'compiler',
       'type': 'none',
       'dependencies': [
@@ skipping 96 matching lines @@
       ],
     },
     {
       'target_name': 'api_docs',
       'type': 'none',
       'dependencies': [
         'utils/apidoc/apidoc.gyp:api_docs',
       ],
     },
     {
+      'target_name': 'editor',
+      'type': 'none',
+      'dependencies': [
+        'editor/build/generated/editor_deps.gyp:editor_deps',
+
+        # This dependency on create_sdk does not mean that the Editor
+        # is rebuilt if the SDK is. It only means that when you build
+        # the Editor, you should also build the SDK. If we wanted to
+        # make sure that the editor is rebuilt when the SDK is, we
+        # should list a *file* in PRODUCT_DIR which the action below
+        # uses as input.
+        # This is the desired behavior as we would otherwise have to
+        # rebuild the editor each time the VM, dart2js, or library
+        # code changes.
+        'create_sdk',
+      ],
+      'actions': [
+        {
+          'action_name': 'create_editor_py',
+          'inputs': [
+            'tools/create_editor.py',
+            '<(SHARED_INTERMEDIATE_DIR)/editor_deps/editor.stamp',
+            '<!@(["python", "tools/list_files.py", "", "editor/tools/features/com.google.dart.tools.deploy.feature_releng"])',
+          ],
+          'outputs': [
+            '<(PRODUCT_DIR)/editor/VERSION',
+          ],
+          'action': [
+            'python',
+            'tools/create_editor.py',
+            '--out', '<(PRODUCT_DIR)/editor',
+            '--build', '<(INTERMEDIATE_DIR)',
+          ],
+          'message': 'Creating editor.',
+        },
+      ],
+    },
+    {
       'target_name': 'samples',
       'type': 'none',
       'dependencies': [
         'samples/openglui/openglui.gyp:openglui_sample',
       ],
       'conditions': [
         ['OS!="android"', {
            'dependencies': [
              'samples/sample_extension/sample_extension.gyp:sample_extension',
            ],
           },
         ],
       ]
     },
     {
       'target_name': 'packages',
       'type': 'none',
       'dependencies': [
         'pkg/pkg.gyp:pkg_packages',
       ],
     },
   ],
 }