Create shared matcher for navigation bar done button.

ios/chrome/browser/metrics/tab_usage_recorder_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/mac/bind_objc_block.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 619 matching lines @@
   // TODO(crbug.com/640977): EarlGrey synchronize on some animations when a
   // page is loading. Need to handle synchronization manually for this test.
   [[GREYConfiguration sharedInstance]
           setValue:@(NO)
       forConfigKey:kGREYConfigKeySynchronizationEnabled];
   OpenSettingsMenuUnsynced();
   OpenSettingsSubMenuUnsynced(IDS_OPTIONS_ADVANCED_SECTION_TITLE_PRIVACY);
   Wait(grey_accessibilityID(kPrivacyCollectionViewId),
        @"Privacy settings view.");
 
-  WaitAndTap(grey_accessibilityLabel(
-                 l10n_util::GetNSString(IDS_IOS_NAVIGATION_BAR_DONE_BUTTON)),
-             @"Close settings");
+  WaitAndTap(chrome_test_util::NavigationBarDoneButton(), @"Close settings");
   [[GREYUIThreadExecutor sharedInstance] drainUntilIdle];
   [[EarlGrey selectElementWithMatcher:chrome_test_util::WebViewContainingText(
                                           responses[slowURL])]
       assertWithMatcher:grey_notNil()];
 
   [[GREYConfiguration sharedInstance]
           setValue:@(YES)
       forConfigKey:kGREYConfigKeySynchronizationEnabled];
 
   histogramTester.ExpectBucketCount(kDidUserWaitForEvictedTabReload,
@@ skipping 286 matching lines @@
     [[GREYUIThreadExecutor sharedInstance] drainUntilIdle];
   }
   // The deleted tabs are purged during foregrounding and backgrounding.
   chrome_test_util::SimulateTabsBackgrounding();
   // Make sure |evicted_tabs_| purged the deleted tabs.
   int evicted = chrome_test_util::GetEvictedMainTabCount();
   GREYAssertEqual(evicted, 0, @"Check number of evicted tabs");
 }
 
 @end