Revert 176910 - Possible breakage of PlatformAppBrowserTest.Messaging

chrome/browser/resources/shared/js/cr/ui/bubble_button.js

-// Copyright (c) 2013 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.
-
-cr.define('cr.ui', function() {
-  /**
-   * An image button that brings up an informative bubble when activated by
-   * keyboard or mouse.
-   * @constructor
-   * @extends {HTMLSpanElement}
-   */
-  var BubbleButton = cr.ui.define('span');
-
-  BubbleButton.prototype = {
-    __proto__: HTMLSpanElement.prototype,
-
-    /**
-     * Decorates the base element to show the proper icon.
-     */
-    decorate: function() {
-      this.className = 'bubble-button';
-      this.location = cr.ui.ArrowLocation.TOP_END;
-      this.image = document.createElement('div');
-      this.image.tabIndex = 0;
-      this.image.setAttribute('role', 'button');
-      this.image.addEventListener('click', this);
-      this.image.addEventListener('keydown', this);
-      this.image.addEventListener('mousedown', this);
-      this.appendChild(this.image);
-    },
-
-    /**
-     * Whether the button is currently showing a bubble.
-     * @type {boolean}
-     */
-    get showingBubble() {
-      return this.image.classList.contains('showing-bubble');
-    },
-    set showingBubble(showing) {
-      this.image.classList.toggle('showing-bubble', showing);
-    },
-
-    /**
-     * Handle mouse and keyboard events, allowing the user to open and close an
-     * informative bubble.
-     * @param {Event} event Mouse or keyboard event.
-     */
-    handleEvent: function(event) {
-      switch (event.type) {
-        // Toggle the bubble on left click. Let any other clicks propagate.
-        case 'click':
-          if (event.button != 0)
-            return;
-          break;
-        // Toggle the bubble when <Return> or <Space> is pressed. Let any other
-        // key presses propagate.
-        case 'keydown':
-          switch (event.keyCode) {
-            case 13:  // Return.
-            case 32:  // Space.
-              break;
-            default:
-              return;
-          }
-          break;
-        // Blur focus when a mouse button is pressed, matching the behavior of
-        // other Web UI elements.
-        case 'mousedown':
-          if (document.activeElement)
-            document.activeElement.blur();
-          event.preventDefault();
-          return;
-      }
-      this.toggleBubble_();
-      event.preventDefault();
-      event.stopPropagation();
-    },
-  };
-
-  // Export.
-  return {
-    BubbleButton: BubbleButton
-  };
-});