Remove calls to MessageLoop::Run/RunUntilIdle from ios/.

ios/chrome/browser/web_resource/web_resource_util_unittest.cc

 // Copyright 2015 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/chrome/browser/web_resource/web_resource_util.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "ios/web/public/web_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace web_resource {
 
 class WebResourceUtilTest : public testing::Test {
  protected:
   WebResourceUtilTest() : error_called_(false), success_called_(false) {}
@@ skipping 21 matching lines @@
     error_ = error;
   }
 
   void FlushBackgroundTasks() {
     // The function is not synchronous, callbacks are not called before flushing
     // the tasks.
     EXPECT_FALSE(success_called_);
     EXPECT_FALSE(error_called_);
 
     web::WebThread::GetBlockingPool()->FlushForTesting();
-    loop_.RunUntilIdle();
+    base::RunLoop().RunUntilIdle();
   }
 
   base::MessageLoop loop_;
   std::string error_;
   std::unique_ptr<base::Value> value_;
   bool error_called_;
   bool success_called_;
 };
 
 TEST_F(WebResourceUtilTest, Success) {
@@ skipping 53 matching lines @@
 
   FlushBackgroundTasks();
 
   // The error callback is called.
   EXPECT_TRUE(error_called_);
   EXPECT_FALSE(success_called_);
   EXPECT_FALSE(error_.empty());
 }
 
 }  // namespace web_resource