[ObjC ARC] Converts ios/testing:ios_test_support to ARC.Automatically generated ARCMigrate commit…

ios/testing/wait_util.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/testing/wait_util.h"
 
 #include "base/test/ios/wait_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace testing {
 
 const NSTimeInterval kSpinDelaySeconds = 0.01;
 const NSTimeInterval kWaitForJSCompletionTimeout = 2.0;
 const NSTimeInterval kWaitForUIElementTimeout = 4.0;
 const NSTimeInterval kWaitForDownloadTimeout = 10.0;
 
 bool WaitUntilConditionOrTimeout(NSTimeInterval timeout,
                                  ConditionBlock condition) {
   NSDate* deadline = [NSDate dateWithTimeIntervalSinceNow:timeout];
   bool success = condition();
   while (!success && [[NSDate date] compare:deadline] != NSOrderedDescending) {
     base::test::ios::SpinRunLoopWithMaxDelay(
         base::TimeDelta::FromSecondsD(testing::kSpinDelaySeconds));
     success = condition();
   }
   return success;
 }
 
 }  // namespace testing