Switch to standard integer types in base/test/.

base/test/mock_log.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_MOCK_LOG_H_
 #define BASE_TEST_MOCK_LOG_H_
 
+#include <stddef.h>
+
 #include <string>
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/synchronization/lock.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace base {
 namespace test {
 
@@ skipping 71 matching lines @@
   // The previous handler to restore when the MockLog is destroyed.
   logging::LogMessageHandlerFunction previous_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(MockLog);
 };
 
 }  // namespace test
 }  // namespace base
 
 #endif  // BASE_TEST_MOCK_LOG_H_