Generate docgen output along with api_docs as part of the build

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': 'most',
       'type': 'none',
       'dependencies': [
@@ skipping 68 matching lines @@
       ],
     },
     {
       # Upload the SDK. This target is separate from create_sdk as the
       # editor needs to build the SDK without uploading it.
       'target_name': 'upload_sdk',
       'type': 'none',
       'dependencies': [
         'create_sdk',
       ],
+      'inputs': [
+        '<(PRODUCT_DIR)/dart-sdk/README',
+      ],
       'actions': [
         {
           'action_name': 'upload_sdk_py',
           'inputs': [
             '<(PRODUCT_DIR)/dart-sdk/README',
             'tools/upload_sdk.py',
           ],
           'outputs': [
             '<(PRODUCT_DIR)/dart-sdk/upload.stamp',
           ],
@@ skipping 49 matching lines @@
       'type': 'none',
       'dependencies': [
         'create_sdk',
         'packages',
       ],
     },
     {
       'target_name': 'api_docs',
       'type': 'none',
       'dependencies': [
+        # TODO(alanknight) : Once we're fully switched over to the new
+        # viewer remove the old api_docs gyp file.
         'utils/apidoc/apidoc.gyp:api_docs',
+        'utils/apidoc/docgen.gyp:docgen',
       ],
     },
     {
       '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
@@ skipping 42 matching lines @@
     },
     {
       'target_name': 'packages',
       'type': 'none',
       'dependencies': [
         'pkg/pkg.gyp:pkg_packages',
       ],
     },
   ],
 }