Add ErrorPageTestCase to external url test suite.

ios/chrome/browser/ui/external_url_error_page_egtest.mm

Index: ios/chrome/browser/ui/external_url_error_page_egtest.mm
diff --git a/ios/chrome/browser/ui/error_page_egtest.mm b/ios/chrome/browser/ui/external_url_error_page_egtest.mm
similarity index 98%
rename from ios/chrome/browser/ui/error_page_egtest.mm
rename to ios/chrome/browser/ui/external_url_error_page_egtest.mm
index 51452b5916595b5d6ab70a0bb03d70e1ff1d1116..efb9806c3832a59de45dff8726cd1439640768fb 100644
--- a/ios/chrome/browser/ui/error_page_egtest.mm
+++ b/ios/chrome/browser/ui/external_url_error_page_egtest.mm
@@ -10,8 +10,8 @@
 #import "ios/chrome/test/earl_grey/chrome_earl_grey.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
-#import "ios/web/public/test/http_server.h"
 #import "ios/web/public/test/earl_grey/web_view_matchers.h"
+#import "ios/web/public/test/http_server.h"
 #include "ios/web/public/test/http_server_util.h"
 #include "ios/web/public/test/response_providers/data_response_provider.h"
 #include "ios/web/public/test/response_providers/error_page_response_provider.h"
@@ -30,14 +30,14 @@ using chrome_test_util::WebViewNotContainingText;
 using web::test::HttpServer;
 
 // Tests display of error pages for bad URLs.
-@interface ErrorPageTestCase : ChromeTestCase
+@interface ExternalURLErrorPageTestCase : ChromeTestCase
 
 // Checks that the DNS error page is not visible.
 - (void)checkErrorPageIsNotVisible;
 
 @end
 
-@implementation ErrorPageTestCase
+@implementation ExternalURLErrorPageTestCase
 
 #pragma mark - utilities