[ios] EarlGrey tests for HTTP Authentication.

ios/chrome/test/earl_grey/chrome_matchers.h

 // 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.
 
 #ifndef IOS_CHROME_TEST_EARL_GREY_CHROME_MATCHERS_H_
 #define IOS_CHROME_TEST_EARL_GREY_CHROME_MATCHERS_H_
 
 #include <string>
 
 #import <EarlGrey/EarlGrey.h>
@@ skipping 21 matching lines @@
 
 // Returns matcher for webview containing |text|.
 id<GREYMatcher> webViewContainingText(std::string text);
 
 // Returns matcher for webview not containing |text|.
 id<GREYMatcher> webViewNotContainingText(std::string text);
 
 // Returns matcher for a StaticHtmlViewController containing |text|.
 id<GREYMatcher> staticHtmlViewContainingText(NSString* text);
 
+// Returns matcher for a cancel button.
+id<GREYMatcher> cancelButton();
+
 // Matcher for the navigate forward button.
 id<GREYMatcher> forwardButton();
 
 // Matcher for the navigate backward button.
 id<GREYMatcher> backButton();
 
 // Matcher for the reload button.
 id<GREYMatcher> reloadButton();
 
 // Matcher for the stop loading button.
@@ skipping 18 matching lines @@
 // Matcher for show tabs button.
 id<GREYMatcher> showTabsButton();
 
 // Matcher for CollectionViewSwitchCell.
 id<GREYMatcher> collectionViewSwitchCell(NSString* accessibilityIdentifier,
                                          BOOL isOn);
 
 }  // namespace chrome_test_util
 
 #endif  // IOS_CHROME_TEST_EARL_GREY_CHROME_MATCHERS_H_