Add initial version of chrome://popular-sites-internals page

chrome/browser/resources/popular_sites_internals.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. */
+
+html {
+  font-size: 20px;
+}
+
+#info > div {
+  width: 100%;
+}
+
+#info h2 {
+  color: rgb(74, 142, 230);
+  font-size: 100%;
+  margin-bottom: 0;
+}
+
+#info .err {
+  color: red;
+}
+
+#info .section {
+  display: inline-block;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+#info .section.hidden {
+  display: none;
+}
+
+.section-details {
+  width: 100%;
+}
+
+.section-details .detail,
+.section-details .value {
+  width: 50%;
+}
+
+.section-details tr:nth-child(odd) {
+  background: rgb(239, 243, 255);
+}
+