Re-enable EarlGrey tests that check static error pages.

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 37 matching lines @@
 }  // namespace
 
 // Earl grey integration tests for Activity Service Controller.
 @interface ActivityServiceControllerTestCase : ChromeTestCase
 @end
 
 @implementation ActivityServiceControllerTestCase
 
 // Test that when trying to print a page redirected to an unprintable page, a
 // snackbar explaining that the page cannot be printed is displayed.
-// TODO(crbug.com/684987): Re-enable this test.
-- (void)
-    DISABLED_testActivityServiceControllerPrintAfterRedirectionToUnprintablePage {
+- (void)testActivityServiceControllerPrintAfterRedirectionToUnprintablePage {
   std::map<GURL, std::string> responses;
   const GURL regularPageURL = web::test::HttpServer::MakeUrl("http://choux");
   responses[regularPageURL] = "fleur";
   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()];
-  id<GREYMatcher> webViewMatcher =
-      web::WebViewInWebState(chrome_test_util::GetCurrentWebState());
-  [[EarlGrey selectElementWithMatcher:webViewMatcher]
-      assertWithMatcher:grey_nil()];
   NSString* const kError =
       l10n_util::GetNSString(IDS_ERRORPAGES_HEADING_NOT_AVAILABLE);
   [[EarlGrey
       selectElementWithMatcher:chrome_test_util::StaticHtmlViewContainingText(
                                    kError)] assertWithMatcher:grey_notNil()];
 
   // Execute the Print action.
   [[EarlGrey selectElementWithMatcher:PrintButton()] performAction:grey_tap()];
 
   // Verify that a toast notification appears.
@@ skipping 52 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