Remove deprecated wait_util methods.

ios/web/public/test/web_test_with_web_state.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/web/public/test/web_test_with_web_state.h"
 
 #include "base/run_loop.h"
 #include "base/strings/sys_string_conversions.h"
 #import "base/test/ios/wait_util.h"
 #include "ios/web/public/web_state/url_verification_constants.h"
@@ skipping 95 matching lines @@
     processed_a_task_ = false;
     base::RunLoop().RunUntilIdle();
     if (processed_a_task_)  // Set in TaskObserver method.
       activitySeen = true;
 
   } while (activitySeen);
   messageLoop->RemoveTaskObserver(this);
 }
 
 void WebTestWithWebState::WaitForCondition(ConditionBlock condition) {
-  base::MessageLoop* messageLoop = base::MessageLoop::current();
-  DCHECK(messageLoop);
-  base::test::ios::WaitUntilCondition(condition, messageLoop,
+  base::test::ios::WaitUntilCondition(condition, true,
                                       base::TimeDelta::FromSeconds(10));
 }
 
 id WebTestWithWebState::ExecuteJavaScript(NSString* script) {
   __block base::scoped_nsprotocol<id> executionResult;
   __block bool executionCompleted = false;
   [GetWebController(web_state())
       executeJavaScript:script
       completionHandler:^(id result, NSError* error) {
         executionResult.reset([result copy]);
@@ skipping 20 matching lines @@
 
 void WebTestWithWebState::WillProcessTask(const base::PendingTask&) {
   // Nothing to do.
 }
 
 void WebTestWithWebState::DidProcessTask(const base::PendingTask&) {
   processed_a_task_ = true;
 }
 
 }  // namespace web