AX: Calendar Picker: Add AX labels to MonthPopupButton and CalendarNavigationButtons.

Source/web/resources/calendarPicker.js

 "use strict";
 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 2745 matching lines @@
     this.hide();
 };
 
 /**
  * @constructor
  * @extends View
  * @param {!number} maxWidth Maximum width in pixels.
  */
 function MonthPopupButton(maxWidth) {
     View.call(this, createElement("button", MonthPopupButton.ClassNameMonthPopupButton));
+    this.element.setAttribute("aria-label", global.params.axShowMonthSelector);
 
     /**
      * @type {!Element}
      * @const
      */
     this.labelElement = createElement("span", MonthPopupButton.ClassNameMonthPopupButtonLabel, "-----");
     this.element.appendChild(this.labelElement);
 
     /**
      * @type {!Element}
@@ skipping 168 matching lines @@
     this.monthPopupButton.attachTo(titleElement);
 
     /**
      * @type {!CalendarNavigationButton}
      * @const
      */
     this._previousMonthButton = new CalendarNavigationButton();
     this._previousMonthButton.attachTo(this);
     this._previousMonthButton.on(CalendarNavigationButton.EventTypeButtonClick, this.onNavigationButtonClick);
     this._previousMonthButton.on(CalendarNavigationButton.EventTypeRepeatingButtonClick, this.onNavigationButtonClick);
+    this._previousMonthButton.element.setAttribute("aria-label", global.params.axShowPreviousMonth);
 
     /**
      * @type {!CalendarNavigationButton}
      * @const
      */
     this._todayButton = new CalendarNavigationButton();
     this._todayButton.attachTo(this);
     this._todayButton.on(CalendarNavigationButton.EventTypeButtonClick, this.onNavigationButtonClick);
     this._todayButton.element.classList.add(CalendarHeaderView.ClassNameTodayButton);
     var monthContainingToday = Month.createFromToday();
     this._todayButton.setDisabled(monthContainingToday < this.calendarPicker.minimumMonth || monthContainingToday > this.calendarPicker.maximumMonth);
+    this._todayButton.element.setAttribute("aria-label", global.params.todayLabel);
 
     /**
      * @type {!CalendarNavigationButton}
      * @const
      */
     this._nextMonthButton = new CalendarNavigationButton();
     this._nextMonthButton.attachTo(this);
     this._nextMonthButton.on(CalendarNavigationButton.EventTypeButtonClick, this.onNavigationButtonClick);
     this._nextMonthButton.on(CalendarNavigationButton.EventTypeRepeatingButtonClick, this.onNavigationButtonClick);
+    this._nextMonthButton.element.setAttribute("aria-label", global.params.axShowNextMonth);
 
     if (global.params.isLocaleRTL) {
         this._nextMonthButton.element.innerHTML = CalendarHeaderView._BackwardTriangle;
         this._previousMonthButton.element.innerHTML = CalendarHeaderView._ForwardTriangle;
     } else {
         this._nextMonthButton.element.innerHTML = CalendarHeaderView._ForwardTriangle;
         this._previousMonthButton.element.innerHTML = CalendarHeaderView._BackwardTriangle;
     }
 }
 
@@ skipping 1078 matching lines @@
         event.stopPropagation();
         event.preventDefault();
     }
 };
 
 if (window.dialogArguments) {
     initialize(dialogArguments);
 } else {
     window.addEventListener("message", handleMessage, false);
 }