Disable EarlGrey tests that break using webview in current webstate.

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 d7df3f9a400eb320c3cd87dd3194e22d09d911e0..9b599f2d94e3717fa84f24111be6691de9d730f2 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
@@ -55,7 +55,9 @@ 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.
-- (void)testActivityServiceControllerPrintAfterRedirectionToUnprintablePage {
+// TODO(crbug.com/684987): Re-enable this test.
+- (void)
+    DISABLED_testActivityServiceControllerPrintAfterRedirectionToUnprintablePage {
   std::map<GURL, std::string> responses;
   const GURL regularPageURL = web::test::HttpServer::MakeUrl("http://choux");
   responses[regularPageURL] = "fleur";