Remove matcher to wait for static HTML view.

ios/chrome/browser/ui/activity_services/activity_service_controller_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 <XCTest/XCTest.h>
 
 #include "base/memory/ptr_util.h"
 #include "components/strings/grit/components_strings.h"
 #import "ios/chrome/browser/ui/browser_view_controller_dependency_factory.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
@@ skipping 55 matching lines @@
   web::test::SetUpHttpServer(
       base::MakeUnique<ErrorPageResponseProvider>(responses));
 
   // Open a regular page and verify that you can share.
   [ChromeEarlGrey loadURL:regularPageURL];
   [ChromeEarlGreyUI openShareMenu];
   AssertActivityServiceVisible();
 
   // Open an error page.
   [ChromeEarlGrey loadURL:ErrorPageResponseProvider::GetDnsFailureUrl()];
-  NSString* const kError =
-      l10n_util::GetNSString(IDS_ERRORPAGES_HEADING_NOT_AVAILABLE);
-  [[EarlGrey
-      selectElementWithMatcher:chrome_test_util::StaticHtmlViewContainingText(
-                                   kError)] assertWithMatcher:grey_notNil()];
+  [ChromeEarlGrey waitForErrorPage];
 
   // Execute the Print action.
   [[EarlGrey selectElementWithMatcher:PrintButton()] performAction:grey_tap()];
 
   // Verify that a toast notification appears.
   [[EarlGrey selectElementWithMatcher:grey_accessibilityLabel(
                                           @"This page cannot be printed.")]
       assertWithMatcher:grey_interactable()];
 
   // Dismiss the snackbar.
@@ skipping 47 matching lines @@
       assertWithMatcher:grey_interactable()];
 
   // Start the Copy action and verify that the share menu gets dismissed.
   [[EarlGrey
       selectElementWithMatcher:chrome_test_util::ButtonWithAccessibilityLabel(
                                    @"Copy")] performAction:grey_tap()];
   AssertActivityServiceNotVisible();
 }
 
 @end