Demo UI made with a help of WUG toolkit (DO NOT SEND TO CQ).

components/demo_ui.gypi

Index: components/demo_ui.gypi
diff --git a/components/demo_ui.gypi b/components/demo_ui.gypi
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+# Copyright (c) 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': [
+    {
+      'variables': {
+         'declaration_file': 'demo_ui/demo.json'
+      },
+      'includes': ['webui_generator/generator/wug.gypi'],
+    },
+    {
+      'variables': {
+         'declaration_file': 'demo_ui/events/events_demo.json'
+      },
+      'includes': ['webui_generator/generator/wug.gypi'],
+    },
+    {
+      'variables': {
+         'declaration_file': 'demo_ui/strings/strings_demo.json'
+      },
+      'includes': ['webui_generator/generator/wug.gypi'],
+    },
+    {
+      'variables': {
+         'declaration_file': 'demo_ui/reuse/reuse_demo.json'
+      },
+      'includes': ['webui_generator/generator/wug.gypi'],
+    },
+  ]
+}