Revert "Speculative revert by sheriff"

ui/file_manager/file_manager/foreground/js/ui/cws_widget_container_error_dialog.js

Index: ui/file_manager/file_manager/foreground/js/ui/cws_widget_container_error_dialog.js
diff --git a/ui/file_manager/file_manager/foreground/js/ui/cws_widget_container_error_dialog.js b/ui/file_manager/file_manager/foreground/js/ui/cws_widget_container_error_dialog.js
new file mode 100644
index 0000000000000000000000000000000000000000..28efbb432ce727495ccb43e48d174a424fff7f64
--- /dev/null
+++ b/ui/file_manager/file_manager/foreground/js/ui/cws_widget_container_error_dialog.js
@@ -0,0 +1,58 @@
+// 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.
+
+/**
+ * @param {HTMLElement} parentNode Node to be parent for this dialog.
+ * @constructor
+ * @extends {cr.ui.dialogs.BaseDialog}
+ */
+function CWSWidgetContainerErrorDialog(parentNode) {
+  cr.ui.dialogs.BaseDialog.call(this, parentNode);
+}
+
+CWSWidgetContainerErrorDialog.prototype = {
+  __proto__: cr.ui.dialogs.BaseDialog.prototype
+};
+
+/**
+ * Whether the dialog is showm.
+ * @return {boolean}
+ */
+CWSWidgetContainerErrorDialog.prototype.shown = function() {
+  return this.container_.classList.contains('shown');
+};
+
+/**
+ * One-time initialization of DOM.
+ * @private
+ */
+CWSWidgetContainerErrorDialog.prototype.initDom_ = function() {
+  cr.ui.dialogs.BaseDialog.prototype.initDom_.call(this);
+  this.frame_.classList.add('cws-widget-error-dialog-frame');
+  var img = this.document_.createElement('div');
+  img.className = 'cws-widget-error-dialog-img';
+  this.frame_.insertBefore(img, this.text_);
+
+  this.title_.hidden = true;
+  this.closeButton_.hidden = true;
+  this.cancelButton_.hidden = true;
+  this.text_.classList.add('cws-widget-error-dialog-text');
+
+  // Don't allow OK button to lose focus, in order to prevent webview content
+  // from stealing focus.
+  // BaseDialog keeps focus by removing all other focusable elements from tab
+  // order (by setting their tabIndex to -1). This doesn't work for webviews
+  // because the webview embedder cannot access the webview DOM tree, and thus
+  // fails to remove elements in the webview from tab order.
+  this.okButton_.addEventListener('blur', this.refocusOkButton_.bind(this));
+};
+
+/**
+ * Focuses OK button.
+ * @private
+ */
+CWSWidgetContainerErrorDialog.prototype.refocusOkButton_ = function() {
+  if (this.shown())
+    this.okButton_.focus();
+};