Remove calls to MessageLoop::Run/RunUntilIdle.

ios/web/net/request_tracker_impl_unittest.mm

 // Copyright 2012 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.
 
 #include "ios/web/net/request_tracker_impl.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
@@ skipping 216 matching lines @@
     receiver_.get()->value_ = 0.0f;
     receiver_.get()->max_ = 0.0f;
     tracker_->StartPageLoad(url, nil);
   }
 
   void EndPage(NSString* tab_id, const GURL& url) {
     DCHECK_CURRENTLY_ON(web::WebThread::UI);
     tracker_->FinishPageLoad(url, false);
     receiver_.get()->value_ = 0.0f;
     receiver_.get()->max_ = 0.0f;
-    loop_.RunUntilIdle();
+    base::RunLoop().RunUntilIdle();
   }
 
   net::TestJobInterceptor* AddInterceptorToRequest(size_t i) {
     // |interceptor| will be deleted from |job_factory_|'s destructor.
     net::TestJobInterceptor* protocol_handler = new net::TestJobInterceptor();
     job_factory_.SetProtocolHandler("http", base::WrapUnique(protocol_handler));
     contexts_[i]->set_job_factory(&job_factory_);
     return protocol_handler;
   }
 
@@ skipping 195 matching lines @@
   const_cast<net::HttpResponseInfo&>(request->response_info()).headers =
       new net::HttpResponseHeaders(headers);
   std::unique_ptr<net::URLRequestTestJob> job(new net::URLRequestTestJob(
       request, request->context()->network_delegate(), headers, "", false));
   AddInterceptorToRequest(0)->set_main_intercept_job(std::move(job));
   request->Start();
 
   tracker_->StartRequest(request);
   tracker_->CaptureHeaders(request);
   tracker_->StopRequest(request);
-  loop_.RunUntilIdle();
+  base::RunLoop().RunUntilIdle();
   EXPECT_TRUE([receiver_ headers]->HasHeaderValue("X-Auto-Login",
                                                   "Hello World"));
   std::string mimeType;
   EXPECT_TRUE([receiver_ headers]->GetMimeType(&mimeType));
   EXPECT_EQ("multipart/mixed", mimeType);
   EXPECT_TRUE([receiver_ headers]->HasHeaderValue(
       "Content-Disposition", "attachment; filename=\"name.pdf\""));
 }
 
 // Do-nothing mock CertificatePolicyCache. Allows all certs for all hosts.
@@ skipping 40 matching lines @@
                                   base::Bind(&TwoStartsSSLCallback,
                                              &request_0_called));
   tracker_->OnSSLCertificateError(GetSecureRequest(1), ssl_info, true,
                                   base::Bind(&TwoStartsSSLCallback,
                                              &request_1_called));
   EXPECT_TRUE(request_0_called);
   EXPECT_TRUE(request_1_called);
 }
 
 }  // namespace