Making the gradient click-through in ChromeSigninViewController

ios/chrome/browser/ui/authentication/signin_interaction_controller_egtest.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import <EarlGrey/EarlGrey.h>
 #import <XCTest/XCTest.h>
 
 #include "base/strings/sys_string_conversions.h"
 #import "base/test/ios/wait_util.h"
 #include "components/signin/core/browser/signin_manager.h"
@@ skipping 344 matching lines @@
   [[EarlGrey selectElementWithMatcher:NavigationBarDoneButton()]
       performAction:grey_tap()];
 
   // Check that there is no signed in user.
   AssertAuthenticatedIdentityInActiveProfile(nil);
 }
 
 // Tests that signing in, tapping the Settings link on the confirmation screen
 // and closing the Settings correctly leaves the user signed in without any
 // Settings shown.
-// TODO(crbug.com/718023): Re-enable test.
-- (void)DISABLED_testSignInOpenSettings {
+- (void)testSignInOpenSettings {
   ChromeIdentity* identity = GetFakeIdentity1();
   ios::FakeChromeIdentityService::GetInstanceFromChromeProvider()->AddIdentity(
       identity);
 
   // Sign in to |identity|.
   OpenSignInFromSettings();
   TapButtonWithAccessibilityLabel(identity.userEmail);
   TapButtonWithLabelId(IDS_IOS_ACCOUNT_CONSISTENCY_SETUP_SIGNIN_BUTTON);
 
   // Tap Settings link.
   id<GREYMatcher> settings_link_matcher = grey_allOf(
       grey_accessibilityLabel(@"Settings"), grey_sufficientlyVisible(), nil);
+  WaitForMatcher(settings_link_matcher);
   [[EarlGrey selectElementWithMatcher:settings_link_matcher]
       performAction:grey_tap()];
 
-  [[EarlGrey selectElementWithMatcher:NavigationBarDoneButton()]
+  id<GREYMatcher> done_button_matcher = NavigationBarDoneButton();
+  WaitForMatcher(done_button_matcher);
+  [[EarlGrey selectElementWithMatcher:done_button_matcher]
       performAction:grey_tap()];
 
   // All Settings should be gone and user signed in.
   id<GREYMatcher> settings_matcher =
       chrome_test_util::StaticTextWithAccessibilityLabelId(
           IDS_IOS_SETTINGS_TITLE);
   [[EarlGrey selectElementWithMatcher:settings_matcher]
       assertWithMatcher:grey_notVisible()];
   AssertAuthenticatedIdentityInActiveProfile(identity);
 }
@@ skipping 196 matching lines @@
 
   // Close sign-in screen and Bookmarks.
   TapButtonWithLabelId(IDS_IOS_ACCOUNT_CONSISTENCY_SETUP_SKIP_BUTTON);
   if (!IsIPadIdiom()) {
     [[EarlGrey selectElementWithMatcher:NavigationBarDoneButton()]
         performAction:grey_tap()];
   }
 }
 
 @end