DevTools: introduce object previews experiment

third_party/WebKit/Source/devtools/front_end/components/objectPropertiesSection.css

 /*
  * Copyright 2015 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.
  */
 
 .object-properties-section .name {
     color: rgb(136, 19, 145);
     flex-shrink: 0;
 }
@@ skipping 46 matching lines @@
     flex-direction: row;
 }
 
 .object-properties-section-root-element::before {
     -webkit-mask-position: -4px -97px !important;
 }
 
 .object-properties-section-root-element.expanded::before {
     -webkit-mask-position: -20px -97px !important;
 }
+
+.object-properties-section .value .object-description {
+    color: gray;
+}