Generate API docs during build.

utils/apidoc/apidoc.gyp

Index: utils/apidoc/apidoc.gyp
diff --git a/utils/apidoc/apidoc.gyp b/utils/apidoc/apidoc.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..ab89fdaddae6c6e5d838212fbd11b8a9207dc504
--- /dev/null
+++ b/utils/apidoc/apidoc.gyp
@@ -0,0 +1,33 @@
+# 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': 'api_docs',
+      'type': 'none',
+      'dependencies': [
+        '../../frog/dart-frog.gyp:frog',
+        '../../runtime/dart-runtime.gyp:dart',
+      ],
+      'actions': [
+        {
+          'action_name': 'run_apidoc',
+          'inputs': [
+            '<(PRODUCT_DIR)/dart',
+            '<!@(["python", "scripts/list_files.py"])',
+          ],
+          'outputs': [
+            '<(PRODUCT_DIR)/api_docs',
+          ],
+          'action': [
+            '<(PRODUCT_DIR)/dart',
+            'apidoc.dart',
+            '--out=<(PRODUCT_DIR)/api_docs'
+          ],
+        },
+      ],
+    }
+  ],
+}