chore(material): add simple e2e smoke tests for components.

modules/examples/e2e_test/material/button_spec.es6

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+var testUtil = require('angular2/src/test_lib/e2e_util');
+
+describe('md-button', function () {
+  var url = 'examples/src/material/button/index.html';
+
+  beforeEach(() => { browser.get(url); });
+  afterEach(testUtil.verifyNoBrowserErrors);
+
+  // Buttons are broken right now, see https://github.com/angular/angular/issues/1602
+});

modules/examples/e2e_test/material/checkbox_spec.es6

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+var testUtil = require('angular2/src/test_lib/e2e_util');
+
+describe('md-checkbox', function () {
+  var url = 'examples/src/material/checkbox/index.html';
+
+  beforeEach(() => { browser.get(url); });
+  afterEach(testUtil.verifyNoBrowserErrors);
+
+  it('should toggle a checkbox', function() {
+    var checkbox = element.all(by.css('md-checkbox')).first();
+
+    checkbox.click();
+    expect(checkbox.getAttribute('aria-checked')).toBe('true');
+
+    checkbox.click();
+    expect(checkbox.getAttribute('aria-checked')).toBe('false');
+  });
+});

modules/examples/e2e_test/material/dialog_spec.es6

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+var testUtil = require('angular2/src/test_lib/e2e_util');
+
+describe('md-dialog', function () {
+  var url = 'examples/src/material/dialog/index.html';
+
+  beforeEach(() => { browser.get(url); });
+  afterEach(testUtil.verifyNoBrowserErrors);
+
+  it('should open a dialog', function() {
+    var openButton = element(by.id('open'));
+    openButton.click();
+    expect(element(by.css('.md-dialog')).isPresent()).toBe(true);
+
+    var dialog = element(by.css('.md-dialog'));
+    dialog.sendKeys(protractor.Key.ESCAPE);
+
+    expect(element(by.css('.md-dialog')).isPresent()).toBe(false);
+  });
+});

modules/examples/e2e_test/material/progress_linear_spec.es6

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+var testUtil = require('angular2/src/test_lib/e2e_util');
+
+describe('md-progress-linear', function () {
+  var url = 'examples/src/material/progress-linear/index.html';
+
+  beforeEach(() => { browser.get(url); });
+  afterEach(testUtil.verifyNoBrowserErrors);
+
+  it('should increment and decrement progress', function() {
+    var progressBar = element.all(by.css('md-progress-linear')).first();
+    var incrementButton = element(by.id('increment'));
+    var decrementButton = element(by.id('decrement'));
+
+    var initialValue = progressBar.getAttribute('aria-valuenow');
+
+    incrementButton.click();
+    expect(progressBar.getAttribute('aria-valuenow')).toBeGreaterThan(initialValue);
+
+    decrementButton.click();
+    decrementButton.click();
+    expect(progressBar.getAttribute('aria-valuenow')).toBeLessThan(initialValue);
+  });
+});

modules/examples/e2e_test/material/radio_spec.es6

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+var testUtil = require('angular2/src/test_lib/e2e_util');
+
+describe('md-radio-button', function () {
+  var url = 'examples/src/material/radio/index.html';
+
+  beforeEach(() => { browser.get(url); });
+  afterEach(testUtil.verifyNoBrowserErrors);
+
+  // Radio buttons are broken right now, see https://github.com/angular/angular/issues/1643
+});