test IWYU fixups for base

base/vlog.cc

 // Copyright (c) 2010 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 "base/vlog.h"
 
+#include <cstddef>
+#include <ostream>
+#include <utility>
+
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 
 namespace logging {
 
 const int VlogInfo::kDefaultVlogLevel = 0;
 
 struct VlogInfo::VmodulePattern {
@@ skipping 151 matching lines @@
     if (MatchVlogPattern(s, p))
       return true;
     s.remove_prefix(1);
   }
 
   // Otherwise, we couldn't find a match.
   return false;
 }
 
 }  // namespace