Switch to standard integer types in base/test/.

base/test/test_mock_time_task_runner.h

 // 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.
 
 #ifndef BASE_TEST_TEST_MOCK_TIME_TASK_RUNNER_H_
 #define BASE_TEST_TEST_MOCK_TIME_TASK_RUNNER_H_
 
+#include <stddef.h>
+
 #include <queue>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/lock.h"
 #include "base/test/test_pending_task.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
@@ skipping 138 matching lines @@
   size_t next_task_ordinal_;
 
   Lock tasks_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(TestMockTimeTaskRunner);
 };
 
 }  // namespace base
 
 #endif  // BASE_TEST_TEST_MOCK_TIME_TASK_RUNNER_H_