Switch to standard integer types in components/, part 2 of 4.

components/history/core/browser/visit_database_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 <stddef.h>
+
 #include <set>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
 #include "components/history/core/browser/url_database.h"
 #include "components/history/core/browser/visit_database.h"
 #include "sql/connection.h"
@@ skipping 570 matching lines @@
     AddVisit(&forward_2, SOURCE_BROWSED);
 
     EXPECT_TRUE(GetHistoryCount(shift_forward,
                                 shift_forward + TimeDelta::FromHours(24),
                                 &result));
     EXPECT_EQ(2, result);
   }
 }
 
 }  // namespace history