Revert of Disable many tests with flaky accessibility audits.

chrome/browser/ui/webui/options/font_settings_browsertest.js

Index: chrome/browser/ui/webui/options/font_settings_browsertest.js
diff --git a/chrome/browser/ui/webui/options/font_settings_browsertest.js b/chrome/browser/ui/webui/options/font_settings_browsertest.js
index 231d6da42556e564a9a263dc9f7abd820b33fd4c..6e419a207cfe0dfd5cfe4448369c7b120d92c14c 100644
--- a/chrome/browser/ui/webui/options/font_settings_browsertest.js
+++ b/chrome/browser/ui/webui/options/font_settings_browsertest.js
@@ -41,14 +41,8 @@
   },
 };
 
-// TODO(crbug.com/657514) Flakes on linux and chromeos.
-GEN('#if defined(OS_LINUX) || defined(OS_CHROMEOS)');
-GEN('#define MAYBE_testOpenFontSettings DISABLED_testOpenFontSettings');
-GEN('#else');
-GEN('#define MAYBE_testOpenFontSettings testOpenFontSettings');
-GEN('#endif  // defined(OS_WIN)');
 // Test opening font settings has correct location.
-TEST_F('FontSettingsWebUITest', 'MAYBE_testOpenFontSettings', function() {
+TEST_F('FontSettingsWebUITest', 'testOpenFontSettings', function() {
   assertEquals(this.browsePreload, document.location.href);
 });