Use ScopedTaskEnvironment instead of MessageLoop in content unit tests.

content/browser/renderer_host/pepper/quota_reservation_unittest.cc

 // Copyright 2013 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 "content/browser/renderer_host/pepper/quota_reservation.h"
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "storage/browser/fileapi/quota/quota_reservation.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using storage::QuotaReservationManager;
 
 namespace content {
 
 namespace {
 
@@ skipping 83 matching lines @@
                     base::File::FLAG_OPEN_ALWAYS | base::File::FLAG_WRITE);
     ASSERT_TRUE(file.IsValid());
     ASSERT_TRUE(file.SetLength(size));
   }
 
   QuotaReservationManager* reservation_manager() {
     return reservation_manager_.get();
   }
 
  private:
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   base::ScopedTempDir work_dir_;
   std::unique_ptr<storage::QuotaReservationManager> reservation_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(QuotaReservationTest);
 };
 
 void GotReservedQuota(int64_t* reserved_quota_ptr,
                       ppapi::FileGrowthMap* file_growths_ptr,
                       int64_t reserved_quota,
                       const ppapi::FileSizeMap& maximum_written_offsets) {
@@ skipping 109 matching lines @@
   EXPECT_EQ(amount, reserved_quota);
   EXPECT_EQ(2U, file_growths.size());
   EXPECT_EQ(file1_size, file_growths[kFile1ID].max_written_offset);
   EXPECT_EQ(file3_size, file_growths[kFile3ID].max_written_offset);
 
   test->CloseFile(kFile1ID, ppapi::FileGrowth(file1_size, 0));
   test->CloseFile(kFile3ID, ppapi::FileGrowth(file3_size, 0));
 }
 
 }  // namespace content