Add a notice about other forms of history to the CBD dialog

chrome/browser/resources/options/clear_browser_data_history_notice_overlay.js

+// Copyright 2016 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.
+
+/**
+ * @fileoverview A popup that may be shown on top of the Clear Browsing Data
+ *     overlay after the deletion finished.
+ */
+
+cr.define('options', function() {
+  /** @const */ var Page = cr.ui.pageManager.Page;
+  /** @const */ var PageManager = cr.ui.pageManager.PageManager;
+
+  /**
+   * A notice to be shown atop of the Clear Browsing Data overlay after
+   * the deletion of browsing history, informing the user that other forms
+   * of browsing history are still available.
+   * @constructor
+   * @extends {cr.ui.pageManager.Page}
+   */
+  function ClearBrowserDataHistoryNotice() {
+    Page.call(this, 'clearBrowserDataHistoryNotice',
+                    loadTimeData.getString('clearBrowserDataOverlayTabTitle'),
+                    'clear-browser-data-history-notice');
+  }
+
+  cr.addSingletonGetter(ClearBrowserDataHistoryNotice);
+
+  ClearBrowserDataHistoryNotice.prototype = {
+    __proto__: Page.prototype,
+
+    /** @override */
+    initializePage: function() {
+      $('clear-browser-data-history-notice-ok').onclick = function() {
+        // Close this popup, and the Clear Browsing Data overlay below it.
+        PageManager.closeOverlay();
+        ClearBrowserDataOverlay.dismiss();
+      };
+    },
+  };
+
+  return {
+    ClearBrowserDataHistoryNotice: ClearBrowserDataHistoryNotice
+  };
+});