Disable EarlGrey tests that break using webview in current webstate.

ios/chrome/browser/ui/error_page_egtest.mm

Index: ios/chrome/browser/ui/error_page_egtest.mm
diff --git a/ios/chrome/browser/ui/error_page_egtest.mm b/ios/chrome/browser/ui/error_page_egtest.mm
index 5b4be88c7cde5a79986741f3d1e65e1c674a15ea..8864a80d37e24a03c6c4401604e66b3199b87c9b 100644
--- a/ios/chrome/browser/ui/error_page_egtest.mm
+++ b/ios/chrome/browser/ui/error_page_egtest.mm
@@ -70,7 +70,8 @@ using web::test::HttpServer;
 #pragma mark - tests
 
 // Tests whether the error page is displayed for a bad URL.
-- (void)testErrorPage {
+// TODO(crbug.com/684987): Re-enable this test.
+- (void)DISABLED_testErrorPage {
   std::unique_ptr<web::DataResponseProvider> provider(
       new ErrorPageResponseProvider());
   web::test::SetUpHttpServer(std::move(provider));
@@ -81,7 +82,8 @@ using web::test::HttpServer;
 }
 
 // Tests whether the error page is displayed if it is behind a redirect.
-- (void)testErrorPageRedirect {
+// TODO(crbug.com/684987): Re-enable this test.
+- (void)DISABLED_testErrorPageRedirect {
   std::unique_ptr<web::DataResponseProvider> provider(
       new ErrorPageResponseProvider());
   web::test::SetUpHttpServer(std::move(provider));