[iOS] Enable ClearSyncedData feature by default.

The feature has been launched to 100% stable. Enable by default.

Bug: 1005509
Change-Id: I62051ded200e047901cf376c11e5c944b6c07c40
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2257325
Commit-Queue: Nohemi Fernandez <fernandex@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#781255}

ios/build/bots/tests/eg_tests.json

@@ -16,9 +16,6 @@
     },
     {
       "app": "ios_chrome_settings_egtests",
-      "test args": [
-        "--enable-features=ClearSyncedData"
-      ],
       "xcode parallelization": true,
       "shards": 1,
       "swarming tasks": 3

ios/chrome/browser/ui/settings/google_services/BUILD.gn

@@ -109,7 +109,6 @@ source_set("eg_tests") {
     "//components/safe_browsing/core/common:safe_browsing_prefs",
     "//ios/chrome/app/strings",
     "//ios/chrome/browser/tabs",
-    "//ios/chrome/browser/ui:feature_flags",
     "//ios/chrome/browser/ui/authentication:eg_test_support",
     "//ios/chrome/browser/ui/bookmarks:eg_test_support",
     "//ios/chrome/test/app:test_support",

ios/chrome/browser/ui/settings/google_services/accounts_table_egtest.mm

@@ -11,14 +11,12 @@
 #import "ios/chrome/browser/ui/bookmarks/bookmark_earl_grey.h"
 #import "ios/chrome/browser/ui/bookmarks/bookmark_earl_grey_ui.h"
 #import "ios/chrome/browser/ui/settings/google_services/accounts_table_view_controller_constants.h"
-#import "ios/chrome/browser/ui/ui_feature_flags.h"
 #import "ios/chrome/grit/ios_strings.h"
 #import "ios/chrome/test/earl_grey/chrome_earl_grey.h"
 #import "ios/chrome/test/earl_grey/chrome_earl_grey_ui.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
 #import "ios/public/provider/chrome/browser/signin/fake_chrome_identity.h"
-#import "ios/testing/earl_grey/app_launch_configuration.h"
 #import "ios/testing/earl_grey/earl_grey_test.h"
 #include "ui/base/l10n/l10n_util.h"
 
@@ -65,12 +63,6 @@ id<GREYMatcher> NoBookmarksLabel() {
   [super tearDown];
 }
 
-- (AppLaunchConfiguration)appConfigurationForTestCase {
-  AppLaunchConfiguration config;
-  config.features_enabled.push_back(kClearSyncedData);
-  return config;
-}
-
 - (void)setUp {
   [super setUp];
 

ios/chrome/browser/ui/ui_feature_flags.cc

@@ -35,7 +35,7 @@ const base::Feature kTestFeature{"TestFeature",
                                  base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kClearSyncedData{"ClearSyncedData",
-                                     base::FEATURE_DISABLED_BY_DEFAULT};
+                                     base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kFirstResponderSendAction{
     "FirstResponderSendAction", base::FEATURE_DISABLED_BY_DEFAULT};

ios/chrome/test/earl_grey/BUILD.gn

@@ -74,11 +74,6 @@ chrome_ios_eg_test("ios_chrome_settings_egtests") {
     "//ios/chrome/browser/ui/settings/password:eg_tests",
     "//ios/chrome/browser/ui/settings/sync:eg_tests",
   ]
-
-  executable_args = [
-    "--args-json",
-    "{\"test_args\": [\"--enable-features=ClearSyncedData\"]}",
-  ]
   xctest = false
 }