Re-enable EarlGrey tests that check static error pages.

ios/chrome/browser/ui/activity_services/activity_service_controller_egtest.mm

Index: ios/chrome/browser/ui/activity_services/activity_service_controller_egtest.mm
diff --git a/ios/chrome/browser/ui/activity_services/activity_service_controller_egtest.mm b/ios/chrome/browser/ui/activity_services/activity_service_controller_egtest.mm
index 9b599f2d94e3717fa84f24111be6691de9d730f2..85f18be2266268763679309d8ff93853a91c609f 100644
--- a/ios/chrome/browser/ui/activity_services/activity_service_controller_egtest.mm
+++ b/ios/chrome/browser/ui/activity_services/activity_service_controller_egtest.mm
@@ -55,9 +55,7 @@ id<GREYMatcher> PrintButton() {
 
 // 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";
@@ -71,10 +69,6 @@ id<GREYMatcher> PrintButton() {
 
   // 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