Use ScopedTaskEnvironment instead of MessageLoop in content unit tests.

content/browser/appcache/appcache_quota_client_unittest.cc

 // Copyright 2014 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 <stdint.h>
 
 #include <map>
 #include <set>
 
 #include "base/bind.h"
 #include "base/run_loop.h"
+#include "base/test/scoped_task_environment.h"
 #include "content/browser/appcache/appcache_quota_client.h"
 #include "content/browser/appcache/mock_appcache_service.h"
 #include "net/base/net_errors.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
 // Declared to shorten the line lengths.
 static const storage::StorageType kTemp = storage::kStorageTypeTemporary;
 static const storage::StorageType kPerm = storage::kStorageTypePersistent;
@@ skipping 115 matching lines @@
   void OnGetOriginsComplete(const std::set<GURL>& origins) {
     ++num_get_origins_completions_;
     origins_ = origins;
   }
 
   void OnDeleteOriginDataComplete(storage::QuotaStatusCode status) {
     ++num_delete_origins_completions_;
     delete_status_ = status;
   }
 
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   int64_t usage_;
   std::set<GURL> origins_;
   storage::QuotaStatusCode delete_status_;
   int num_get_origin_usage_completions_;
   int num_get_origins_completions_;
   int num_delete_origins_completions_;
   MockAppCacheService mock_service_;
   base::WeakPtrFactory<AppCacheQuotaClientTest> weak_factory_;
 };
 
@@ skipping 258 matching lines @@
   // A real completion callback from the service should
   // be dropped if it comes in after NotifyAppCacheDestroyed.
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(1, num_delete_origins_completions_);
   EXPECT_EQ(storage::kQuotaErrorAbort, delete_status_);
 
   Call_OnQuotaManagerDestroyed(client);
 }
 
 }  // namespace content