Use a direct include of strings headers in base/.

base/threading/thread_id_name_manager.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 "base/threading/thread_id_name_manager.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "base/logging.h"
 #include "base/memory/singleton.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 
 namespace base {
 namespace {
 
 static const char kDefaultName[] = "";
 static std::string* g_default_name;
 
 }
 
 ThreadIdNameManager::ThreadIdNameManager()
@@ skipping 80 matching lines @@
   DCHECK((id_to_handle_iter!= thread_id_to_handle_.end()));
   // The given |id| may have been re-used by the system. Make sure the
   // mapping points to the provided |handle| before removal.
   if (id_to_handle_iter->second != handle)
     return;
 
   thread_id_to_handle_.erase(id_to_handle_iter);
 }
 
 }  // namespace base