Create ChromeEarlGrey waitForWebViewContainingText.

ios/chrome/browser/ui/external_url_error_page_egtest.mm

 // 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.
 
 #import <EarlGrey/EarlGrey.h>
 
 #include "components/strings/grit/components_strings.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
 #include "ios/chrome/test/app/web_view_interaction_test_util.h"
 #import "ios/chrome/test/earl_grey/chrome_earl_grey.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
 #import "ios/web/public/test/earl_grey/web_view_matchers.h"
 #include "ios/web/public/test/http_server/data_response_provider.h"
 #include "ios/web/public/test/http_server/error_page_response_provider.h"
 #import "ios/web/public/test/http_server/http_server.h"
 #include "ios/web/public/test/http_server/http_server_util.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 using chrome_test_util::OmniboxText;
 using chrome_test_util::TapWebViewElementWithId;
-using chrome_test_util::WebViewContainingText;
 using chrome_test_util::WebViewNotContainingText;
 
 using web::test::HttpServer;
 
 // Tests display of error pages for bad URLs.
 @interface ExternalURLErrorPageTestCase : ChromeTestCase
 
 // Checks that the DNS error page is not visible.
 - (void)checkErrorPageIsNotVisible;
 
@@ skipping 94 matching lines @@
       "<script>setTimeout(" + "function() { document.body.innerHTML+='<p>" +
       kTimerCompleted + "</p>" + "<iframe src=\"" +
       ErrorPageResponseProvider::GetDnsFailureUrl().spec() +
       "\"></iframe>'}, 1000);" + "</script>";
   std::unique_ptr<web::DataResponseProvider> provider(
       new ErrorPageResponseProvider(responses));
   web::test::SetUpHttpServer(std::move(provider));
 
   [ChromeEarlGrey loadURL:URL];
   // Check that the timer has completed.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kTimerCompleted)]
-      assertWithMatcher:grey_notNil()];
+  [ChromeEarlGrey waitForWebViewContainingText:kTimerCompleted];
   // DNS error page should still not appear.
   [self checkErrorPageIsNotVisible];
 }
 
 // Tests that the error page is not displayed if the navigation was not
 // user-initiated.
 - (void)testErrorPageNoUserInteraction {
   // Create map of canned responses and set up the test HTML server.
   std::map<GURL, std::string> responses;
   const GURL URL =
@@ skipping 15 matching lines @@
                    "</p><iframe src=" +
                    ErrorPageResponseProvider::GetDnsFailureUrl().spec() +
                    ">\"}, " + kTimeoutMs + ");'></form>";
   std::unique_ptr<web::DataResponseProvider> provider(
       new ErrorPageResponseProvider(responses));
   web::test::SetUpHttpServer(std::move(provider));
 
   [ChromeEarlGrey loadURL:URL];
   TapWebViewElementWithId(kButtonId);
   // Check that the timer has completed.
-  [[EarlGrey selectElementWithMatcher:WebViewContainingText(kTimerCompleted)]
-      assertWithMatcher:grey_notNil()];
+  [ChromeEarlGrey waitForWebViewContainingText:kTimerCompleted];
   // DNS error page should still not appear.
   [self checkErrorPageIsNotVisible];
 }
 
 @end