Remove calls to deprecated MessageLoop methods in chrome.

chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc

 // Copyright (c) 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 "extensions/browser/api/declarative_webrequest/webrequest_rules_registry.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/json/json_reader.h"
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "base/stl_util.h"
 #include "base/test/values_test_util.h"
 #include "base/values.h"
 #include "chrome/common/extensions/extension_test_util.h"
 #include "components/url_matcher/url_matcher_constants.h"
 #include "content/public/test/test_browser_thread.h"
 #include "extensions/browser/api/declarative/rules_registry_service.h"
 #include "extensions/browser/api/declarative_webrequest/webrequest_constants.h"
 #include "extensions/browser/api/web_request/web_request_api_helpers.h"
 #include "net/base/request_priority.h"
@@ skipping 59 matching lines @@
   WebRequestRulesRegistryTest()
       : ui_(content::BrowserThread::UI, &message_loop_),
         io_(content::BrowserThread::IO, &message_loop_) {}
 
   ~WebRequestRulesRegistryTest() override {}
 
   void SetUp() override;
 
   void TearDown() override {
     // Make sure that deletion traits of all registries are executed.
-    message_loop_.RunUntilIdle();
+    base::RunLoop().RunUntilIdle();
   }
 
   // Returns a rule that roughly matches http://*.example.com and
   // https://www.example.com and cancels it
   linked_ptr<api::events::Rule> CreateRule1() {
     base::ListValue* scheme_http = new base::ListValue();
     scheme_http->AppendString("http");
     base::DictionaryValue* http_condition_dict = new base::DictionaryValue();
     http_condition_dict->Set(keys2::kSchemesKey, scheme_http);
     http_condition_dict->SetString(keys2::kHostSuffixKey, "example.com");
@@ skipping 704 matching lines @@
   // This is a correct match.
   GURL url2("http://foo.com/index.html");
   std::unique_ptr<net::URLRequest> request2(
       context.CreateRequest(url2, net::DEFAULT_PRIORITY, NULL));
   WebRequestData request_data2(request2.get(), ON_BEFORE_REQUEST);
   deltas = registry->CreateDeltas(NULL, request_data2, false);
   EXPECT_EQ(1u, deltas.size());
 }
 
 }  // namespace extensions