Create suffix to run more than one flaky EarlGrey target.

ios/chrome/test/earl_grey/chrome_test_case.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 "ios/chrome/test/earl_grey/chrome_test_case.h"
 
 #import <objc/runtime.h>
 
 #import <EarlGrey/EarlGrey.h>
 
 #include "base/mac/scoped_block.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
 #include "ios/chrome/test/app/settings_test_util.h"
 #include "ios/chrome/test/app/signin_test_util.h"
 #import "ios/chrome/test/app/sync_test_util.h"
 #import "ios/chrome/test/app/tab_test_util.h"
 #import "ios/web/public/test/http_server.h"
 
 namespace {
 
+NSString* const kFlakyEarlGreyTestTargetSuffix = @"_flaky_egtests";
+
 // Contains a list of test names that run in multitasking test suite.
 NSArray* whiteListedMultitaskingTests = @[
   // Integration tests
   @"testContextMenuOpenInNewTab",        // ContextMenuTestCase
   @"testSwitchToMain",                   // CookiesTestCase
   @"testSwitchToIncognito",              // CookiesTestCase
   @"testFindDefaultFormAssistControls",  // FormInputTestCase
   @"testTabDeletion",                    // TabUsageRecorderTestCase
   @"testAutoTranslate",                  // TranslateTestCase
 
@@ skipping 75 matching lines @@
   [[EarlGrey selectElementWithMatcher:grey_systemAlertViewShown()]
       assertWithMatcher:grey_nil()
                   error:&error];
   if (error != nil) {
     NSLog(@"System alert view is present, so skipping all tests!");
     return @[];
   }
 
   // Return specific list of tests based on the target.
   NSString* targetName = [NSBundle mainBundle].infoDictionary[@"CFBundleName"];
-  if ([targetName isEqualToString:@"ios_chrome_flaky_egtests"]) {
-    // Only run FLAKY_ tests for the flaky test suite.
+  if ([targetName hasSuffix:kFlakyEarlGreyTestTargetSuffix]) {
+    // Only run FLAKY_ tests for flaky test suites.
     return [self flakyTestNames];
   } else if ([targetName isEqualToString:@"ios_chrome_multitasking_egtests"]) {
     // Only run white listed tests for the multitasking test suite.
     return [self multitaskingTestNames];
   } else {
     return [super testInvocations];
   }
 }
 
 // Set up called once for the class, to dismiss anything displayed on startup
@@ skipping 159 matching lines @@
           [NSInvocation invocationWithMethodSignature:methodSignature];
       invocation.selector = selector;
       [multitaskingTestNames addObject:invocation];
     }
   }
   free(methods);
   return multitaskingTestNames;
 }
 
 @end